Raising two children will be a doddle compared to this. Honestly. After the nightmare pregnancy, having a newborn was like the arrival of the dawn after a long night.
And whether that's as a single parent or not, well tbh being a single parent is probably easier than staying with your partner given he seems to do nothing and be unsupportive.
What you are enduring right now is harder. But you are managing. Your first post was 9 days ago. That's 9 days that you've managed since, and with every passing day the likelihood that the nausea will decrease grows.
In the meantime, there are things you can do to help - going to your dad's, asking for a review of medication, starting anti anxiety medications etc can all help in the meantime.
Have you talked to the doctor's about when is the earliest they will induce you? And be totally honest with them - you need to ask the question 'if this gets so bad that I'm suicidal and just can't continue will you induce/do a planned section?' I mean, you are so close to viability now, and there might be more options between terminate and wait until full term. I mean, by 28w your baby has a 95% chance of survival, and I'd hope that if you were suicidal and out of option, inducing you then could be an option. And yes it's not great for the baby, but it's a lot better for her than a termination.
They need to be talking to you about how they are going to manage your mental health in the period between not being allowed abortion ok demand, and you being able to have the baby safely, to reassure you that you aren't going to be abandoned. Does the hospital know just how wretched and desperate you are?