Contractions?

I’m just curious if anyone has experienced this. I’m 28w2d and over the past week I’ve had two instances where I had really strong crampy pain almost like a period cramp where you feel icky like you have to poo. They hurt and made me feel sick. Also they both happened after I finished eating. Were these actual contractions? Should I be worried? I have a dr appointment Thursday and will definitely let my dr know. TIA!