belly cramps?

almost 23wks & yesterday it felt like I had BH but they obviously went away. today I got my oldest on the bus, did some dishes, took the puppy outside a few times & watched like 10 min of a movie. I went into the kitchen to figure out what I wanted to eat (instantly got nauseous looking for something) so now I'm on the couch again & my stomach is cramping up & it's pretty uncomfortable. not a coming & going but constant cramping. like pain that doesn't disappear. I'm not starving & i had a bowel movement this morning so it's not that either. doesn't feel like round ligament pain feels like period cramps