i agree with reggio, def take a anti inflamatory and ice for sure, also try not to sit a lot, even lay down if you have to just for a bit, but I think sitting makes it worse. Call your chiropractor and get in ASAP, sciatic can knock you on your back for days if you don't take care of it. def take pain pills and ice for sure. I feel for you, I have chronic back trouble and know how it can effect my entire day. Take care of yourself.