Intense sciatica - HELP!!

I’m 31 weeks and this has been going on since about 20 weeks. It is not a pain that comes and goes it is CONSTANT. It is in my lower right back and leg and sometimes my hips and down my leg. I’m running out of ideas to make it better. I’m a kindergarten teacher and on my feet all day bending, picking up, walking around, etc. I’m in tears at work and coming home.

I’ve tried chiropractor, physical therapy, natural numbing lotions, heat and ice, therapeutic massage and nothing is working! I also sleep on my side with a pillow between legs and soak in a warm bath every night. Not sure what else to do, I am at a loss and totally miserable. Can’t get up from a chair without intense pain and it’s occurring even when I’m sitting now.. any other mamas have advice? I’m at a loss :(