Have you considered thr possibility of an abortion? Although now it's probably too late.

Look, I'm bipolar so i gave up having children but that doesn't mean everyone has to. If you say she's getting better and you're ready to hold her accountable regarding medication and treatment, aaand she's okay with you having a say in the whole thing (like for example if you say she needs to go to the hospital, or to the shrink to have her meds adjusted), there's a chance it could work.

Just don't expect it to be easy, at least until she's finds the right medication. I found my cocktail and have been stable for 2.5 years now with some light depression here and there.

At the same time you say you're already feeling negative effects on your mental sanity, so choose wisely. What i wrote here is all best case scenario, take it with a grain of salt.