Can’t sleep on left side what to do

So ok so I know from having my first that the doctors tell you you’ve got to sleep on your left side when your pregnant in the later part of the pregnancy but I’m kind of screwed. I have a severe problem with my sciatic nerve on my left side I can’t even lay on my left side for 2 minutes without being in excruciating pain I always sleep on my right side all night sometimes I’ll lay on my back for an hour or so when my right side gets sore. What am I going to do is it really that dangerous? I’m also terrified of the last part of my pregnancy I had such bad pain with my first that I wanted to die it was the worst pain I’ve ever felt in my life I’m horrified to have it happen again. I did physical therapy last time to help with the pain and it did literally nothing for me!?!? Does chiropractor really help with that bad back and hip pain for the last part of pregnancy and of it does how long does it help for and how much does it cost each time