Is this depression?

My daughter has moderate autism and has been very violent lately, my oldest moved home (21) to go back to school, and now says he wants to be a girl, my mom moved in last summer so she could get on her feet, and she hasn't left yet..or even finished paying her shit so she can...and it had only been 4 months since I finally stopped the online affair my husband had been carried in for two years when I became pregnant. It became online after we moved away..before that he says they only kissed and talked. No idea if that's true. He's been through counseling, and is going back tomorrow, after I caught him with porn 5 or so weeks ago.  Not to mention, with this and only this pregnancy, I have HG. I'm always sick..at 22 weeks. I don't want to do anything. I'm always tired and don't call my friends anymore. I am still working when I can get away from the toilet long enough..is it normal to be so tired and not have any energy? I'm also struggling with body issues. I lost 100 pounds thanks to the stress I'd been living, and truthfully, I looked good..and now I look awful and can't stand seeing myself or how hard it is to move my body.