Swelling and Pain. Help 😩

I battled sciatica and I thought it was getting better after my baby dropped. Well now it's back and worse than ever. It hits me and I can't walk. I crawled up the stairs when I got home from work and got right into bed. Within about 30 minutes, my legs, ankles, and feet swelled up and I can't even see my ankle bones. I have so much pressure that it feels like he might fall out of me. How am I supposed to do this for 4 more weeks?? 
On the bright side, yesterday was the first day in months that I haven't had morning sickness. I finally held down food for a whole day.