17wks 5ds feels like BH? Help!?

I have been having severe lower back pain and cramping in the right side near my pelvis, it is so bad I can't lay down or sit still I just have to keep massaging it and stretching, it feels so tight and is a throbbing pain, it keeps going and coming back and kept me awake all night. I'm 17wks 5ds and not sure what to do, the pain is making me feel really sick and causing me to sweat. I can't get a doctors appointment not sure what to do. Help!