Contractions or something else?

So earlier tonight for about an hour i had really bad cramping that went all the way around from back to front almost feels like gas or constipation pains because its not in waves like i expect contractions to be? I had some tightening like my normal bh during this time but no pattern and baby was moving but her movements were boarderline painful! Well it passed after an hour and a half or so. Now a few hours later laying in bed i am having the same cramping maybe worse now? I did have diarrhea today but im only 36+4 and a ftm so i dont think im going into labor already?? Idk...