Slipped disc?!?!

Lindsay
I am 29 weeks today and I was in the car from 1:30 till 11pm yesterday riding back from Florida. I have been having pelvic pain and just haven't gotten a maternity support belt yet. But today I was at my parents house and I stood up from the couch and my back hurt so bad. I can't stand up straight and I can barely walk. I have to hold on to something to walk. Of course it happens on a Sunday when nothing but the Er is open lol. I'm not sure what to do? If there is anything I can do today before work tomorrow would be best but I think I need to see a chiropractor? I'm only 25 and I've only gained 5 lbs so far so I am just shocked!