Sounds to me like Round Ligament Pain. I didn't get a real bad case of it thankfully, but some of the mommas in my thread had it so bad at times they couldn't walk. My doc told me to try a heating pad and relaxing on my left side. If it is really making u worry call ur hospital or call ur doc tomorrow. I hope you feel better,:)
I had that when I was pregnant and it was sooo bad sometimes that I couldn't even move. Did you have your ultrasound yet???
I went in to the doctor for the saaaaame exact thing. I mean all the symptoms you're telling me were me - to the T! When I went in, they told me the same thing that another lady posted before me - round ligament pain - hot pads - and relax on your left side as much as you can.
For me, the hot pads did not help and actually made me feel kind of worse. It finally went away on its own after a couple of weeks of just trying to relax a lot. I would recommend taking some Tylenol too, that kind of eased the pain away for me.
I have that too! Round ligament pains. It sucks and hurts.. and you pretty much have to live it with it.. ahhhh the joys of pregnancy!