Hopeful2102 firstly id say try your best to keep calm (easier said then done i know) ... but focus on things you can be in control of, for example dont focus on your scan showing anything negative because its something that you cant control and will only know once you go for your scan - try and think positive with your baby and do what you can to stay healthy....
A part of staying healthy is not putting too much stress on yourself, put you and your baby first!!!
Your job - do you have any real reason to believe your probation wont go the way you want? have you done anything wrong or not done a good job? ... between now and your meeting just get your head into your work and do the best job you can do
Your babies dad - this is a tough one as i dont know what he has or hasnt done but id say he out of anybody should be supporting you right now, and if he isn't then i wouldn't waste your time, things will be hard as a single parent but not as hard as if you have a liar dragging you down and pulling at your emotions. If he wants to be apart of the babies life he needs to grow up to the task.
I really wouldn't worry about what everybody else thinks of you, i can assure you even the most 'together' people have some sort of dilemma/drama going on in there life - just not everybody lets people know! ...
You only get one life, if you feel things need changing, then change them for the better - if they are things that cant be helped you have to go with the flow and sort out everything in your control!!
I hope your ok, being pregnant can make you very emotional and your hormones are all over the place - i really hope you can see things clearer and that somehow i may have helped.