What would you do in this situation? Sorry it's lengthy?

I am 28 weeks pregnant and it's already getting harder and harder to walk. The doctor says it's "round ligament pain" and tells me to just take it easy and that I will be fine. Anyway the situation is that because we moved I started working about 7 weeks ago. I have worked at this job before. It's just a call center. However, we live 20 miles away from the town where my work is. My husband's work is in the opposite direction. We only have one car. So he takes me to work and drops me off then takes the kids to my mother's We pay her 100 dollars a week to watch the kids. Between the gas and the childcare we aren't really breaking even with me working.

I would be fine with quitting and I think we could afford things better. However, my husband is worried about what will happen when I'm at home with the kids all day. When I was staying home before I was in the throes of Postpartum Depression and I was crying, angry, and suicidal and ended up spending a night in the hospital because of it. That was last spring/summer, when our little one was first born. He is now 11 months old and my oldest is 3 years old, and like I said I'm 28 weeks. I have not had depression symptoms for awhile and I ran out of antidepressants when I was about 20 weeks and never refilled them.

So, what do you think. Any answers would be appreciated.