"The thing is I normally do most of the household tasks and chores even though he works half the hours I do. Now I'm working from home full time and he's on furlough and he's still done nothing to help me in the two weeks he's been off."
It's time for you both to sit down and have a serious talk, don't you think? Because I don't think you have yet, have you? You've been together 6 years, you've always wanted children. " It just seemed like it was time." I think you've both drifted into this without tinking about the practicalities.
I'd also guess you've both just drifted into you doing most of the household stuff too. You say " In fairness I'm a bit of a control freak and he's always been rubbish at that stuff so it's always seemed easier for me to just get on with it." Not sensible, not sensible at all (but incredibly common).
For starters, being rubbish at something isn't going to change if you don't keep trying, practicing, doing - is it? So the answer to being rubbish at something is to put some bloody effort into being less rubbish, not leaving it to somebody else to do.
You see it as 'easier' if you just do it. Give that some thought. Is that the best way to go, really? Think about when you do have children - will you keep doing things yourself because it's easier, or will you show them how to do it, stand back and let them be a bit rubbish at fist but encourage them to keep trying until they get good enough at it to be independent? Yes it is easier to do it yourself, but then they grow into adults who are incapable of cooking, laundry, cleaning, budgeting - you get my drift? Just as you have to stand back and let children learn, you will have to sit on your hands and bite your tongue whilst HE learns.
It really is time - well past time really - to make it clear that you are his partner and not his mother and you expect him to be a damned adult and share the work and the responsibilities of the household. Especially as that workload is going to ramp up significantly when the baby is here. He currently sounds like a sulky teenager - that's not good enough now. And it was never good enough, but you and he drifted into this.
So - stop drifting. Sit down and TALK. Talk about what it takes to run a household, and how it makes you feel to have it mostly left to you. Talk about what's holding him back (if anything!) from getting off his arse and just DOING what needs doing, without having to be told in detail what to do.
I guess I just didn't think about the equilibrium of the relationship so much until the last few weeks. "^
It happens to a lot of us. But you've started to think about it now, and you can see how skewed it is. So you need to TALK to each other. Because it's going to have to change. He can't just expect you to carry him, you need to be a team, a partnership. He needs to do more. You need to step back and let him do it.