Pulled muscle!

Took a pretty full belly breath and felt a pull on one side, close to my pelvic bone. Definitely still tender and kind of hurts in my bum, hard to describe.  Definitely not round ligament pain.  It was like my belly pushed too hard on my uterus.  I'm about 15 and a half weeks. Anyone else feel something similar? My SO was like "careful" I told him I'd try not to breath next time ;)