10-11 weeks and not sure what to do

I am a mom of 2. I am not single but am My fiance and I have been in a very bad spot in our relationship. Like truly to the point I am not sure remaining together is an option. We recently found out I am pregnant with baby 3 (very bad timing). I also am the full financial provider for my family. My fiancé (baby 2 &3 dad) struggles with bipolar depression, anxiety & addiction. I thought we would have progressed more through those situations but have not. We recently moved into a new home (more expensive than our last) and he told me he was looking for work and had an opportunity to go back to his old job (made over $100k per year). So he convinced me to take a loan out for transportation to go back to work. Well that was not true. So now not only have our living expenses increased but I have a $450 loan I am having to figure out how to pay for. Amidst all this, my work hours and income just got cut into HALF. He is still not looking for work and expects me to figure it out, ALL WHILE BEING PREGNANT and so sick that it makes it near impossible to work my server job as is. I have applied for so many jobs and the interviews I have had, I don’t think they are hiring me because I am already showing. So they know I’ll need time off eventually if I have the baby. I am literally at a loss for what to do. I didn’t want a 3rd child, at least right now. I have been going back and forth weighing options on abortion, adoption and keeping the baby but I am leaning towards abortion. I never ever thought I would be sitting here writing this or even considering this option but I don’t think I can keep this baby but I feel if I continue the pregnancy there is no way I would be able to put it up for adoption. It morally feels wrong to have an abortion. I just don’t know how I can continue to take care of my kids I already have or even myself without one.

Please give me advice. I am literally at a loss and am having such a hard time.