31w and cramping with having to run to the bathroom (tmi but diarrhea bad) normal?

I'm 33 weeks and had that yesterday. I woke up with what I think is braxton hicks (but idk but it hurt pretty bad. Kept going to bathroom but couldn't get much out and was throwing up. I drink some water with baking soda and felt alot better.

Thanks. I'm stated to get nausea with it to :(

See if you can time your pain, like if it comes and goes. If it does go get checked