@sciecha Congratulations on the pregnancy and being nearly done with your PhD. With the benefit of experience and hindsight, I actually think a PhD is the best time in an academic career to start a family. The pressure of publications and time pressure (the clock starts ticking from the moment you pass your viva) become much more intense the further you progress in your career. The advice below is based on the assumption you are doing a lab-based science PhD, which it sounds like you are.
I finished my PhD over 7 years ago and am currently pregnant with our first baby, although I met my husband in my first year of PhD and we could have had kids much sooner relationship-wise. But, as you well know, it just never seems the right time. First you're waiting for more financial stability, then to get this paper published or this funding approved etc etc etc. It's a race against the clock once you finish your PhD. I'm happy with my decision, but I did start and finish my PhD very young.
Regardless of what your PhD supervisor might say (and I have been on both sides), your goal is to get a decent thesis written up and to learn as much as you can during your PhD. Essentially, you are trying to set yourself up for future success by learning how to be a good scientist and mastering relevant techniques (particularly important if you plan to move to industry). Your future and career success will be dictated by your productivity and impact factor of the publications you produce as a post-doc, not as a PhD student. Getting lots of data and good publications from your PhD helps, of course, but your future employer will care more about what you know, how strong your scientific reasoning is, your ability to come up with novel research ideas and plan and execute experiments. I didn't have a publication when I finished my PhD. I did publish my PhD work in a high-impact journal in the end but it was nearly 4 years after my viva! In the meantime, I started a postdoc at one of the best universities in the world, decided I didn't like the lab and got another postdoc in another top lab. Both were 5-year contracts despite not having published my PhD work. I'm telling you this to say that you can get jobs even in the best labs in the world without having a first-author publication from your PhD on your CV. I also know of other people who have also moved on to take very competitive postdoc positions without having published from their PhD. And having been on interview panels myself, I know that a publication is desirable but not the most decisive factor. With covid delays in the mix, people will be even more understanding, so please don't worry about the amount of data you have right now. It is what it is and you need to focus on the end goal.
Now, what you do need right now is to write up your thesis asap because it will be much harder to do if you try to come back to it after baby. And then, having written the thesis, decide strategically whether it is best for you to submit the thesis or ask for a break from your studies, since you will be unpaid anyway. The reason you might want to delay submitting the thesis is simple: many grants and fellowships will have a time limit post-Viva when you are eligible to apply. You will get an allowance for an extra year if you've had a baby but still, the later you have your viva, the better for you right now. Alternatively, I would submit asap if you current lab or university can transfer you onto a "bridging contract" or a postdoc contract. I think that, as long as you are in employment by 25 weeks of pregnancy, you will qualify for some financial assistance from the state.
Finally, every PhD student I know currently has received a 6-month funding extension owing to covid delays. Have you and your supervisor tried to apply for/access such extra funds? It might mean you could be paid until the end of your pregnancy at least.
As hard as academia and the job insecurity it brings are, I feel that remembering there are positives too helps during difficult times: beyond the fact that most of us love what we do (huge plus), working in an academic research lab is still one of the most flexible jobs I know. Most of us can organise our work around our schedules and don't have defined working hours every day as most jobs do. More often than not, this means we end up working a lot more than a "traditional" job and I have personally worked more weekends than not over the past 12 years. But it also allows you to arrive and leave when you need to, as long as you can figure out how to get your work done, which is a blessing for people with young families. And you can also have periods of more intense work and periods of less intense work to accommodate for other things in your life. Moreover, all labs I've been in have allowed me to work from home when I had periods of computer work (writing thesis, writing papers, intense data analysis), even before covid times. Again, that gives you huge flexibility to organise your work around other commitments. In terms of funding: yes, it sucks being always on fixed-term contracts! It helps to join top labs that are more likely to have a constant stream of funding etc. It also helps to secure jobs with a 3-5 year contract (again, well-funded labs that have been awarded a big grant), rather than 1 or 2 years, which seems to be all too common these days. But ultimately, let's not forget that, unlike most other jobs under the sun, you can't really be fired during your contract and, importantly, you know exactly when your contract is ending. I have friends who have been made redundant with 1 months' notice. In academia, I know exactly when my contract ends and can start planning for it or applying for another job many months in advance. I rather appreciate that.
Good luck with writing your thesis (it can be done much faster than you think - about 6 weeks if you buckle down and just do it! Again speaking from mine and others' experience) and hang in there! You can do it and you will be alright. 
