It sounds like contractions have u been timing it to see how far apart they are... u time from start to finish of contraction and in between
I had the same thing happen to me yesterday and went in (which by then felt better) they said I had 2 contractions while there, which felt like cramps, but someone else just told me it sounded like severe Braxton hicks!Mine felt like stabbing cramping pains with headache and sharp pain running up my back with pelvic pressure! Hopefully this helps, feel better soon! Oh and drink LOTS of water!!