Braxton hicks ?

I am 28 weeks and 2 days. Today I experienced something so strange. I was eating some lunch on the couch and I suddenly felt a pain in my back that came around to my stomach. I immediately felt a little nauseous. It wasn’t super painful but it was uncomfortable. I have no idea what it was. I was wondering if it was my first Braxton hicks contraction. (I’ve read they can start as soon as 16 weeks) Or if it was just a random burst of pain. If you’ve experienced something like this lmk ❤️

Any March mommies ?