Bump grew overnight

Hannah
So the night befor last I woke up with crazy back pain that switched back and forth from back to stomach. Crazy Braxton hicks and painful intagestion. I ended up throwing up more than I have in years and heading to the hospital at 3am. 
Turns out I had muscle spasms. The nurse said its like a Charlie horse in your uterus. She gave me a shot to calm it down then I was discharged after I was checked for not dialating. 
I went home and slept the whole day. When I woke up at night my stomach felt huge!! I can no longer bend and get stuff off the ground and getting up from sitting is a feat. 
Has anyone else had spasms like that or growth of bump so fast? I feel like I'm in a scifi movie. It's weird.