28 weeks and already feel like I have postpartum depression

This pregnancy has been pretty hard for me physically and mentally. But lately I've been feeling so overwhelmed and it makes sometimes shut down or break down crying.

Last year I lost my baby at 21 weeks so I've been very paranoid and scared throughout this pregnancy. I was also very sick for the first 16 weeks so mentally it was really tough. Now I'm bigger, chasing around my almost 3 year old who literally never steps. My husband is constantly working or working on fixing up our house that we bought last year so I just feel like the childcare and cleaning up around the house is all on me. I also work a full-time job that had me traveling a lot and completely fills my day, I rarely have time to do anything besides work or take care of my toddler. On top of that I'm just constantly paranoid I'm not feeling enough movement and it scares me.

I'm so drained and overwhelmed mentally all I can think about is trying to push through until I have the baby and I know she is safe and here with me, I'll get a break from work and my toddler will be at preschool during the day. I wish I could enjoy this time but all I want to do is lay in bed and sleep through all of this. I feel like I'm being a bad mom to my toddler and I wish I wanted to play and run around with him, it makes me feel so bad. I don't know how to get through these next 3 months trying to be happier and less worried and depressed.