Are these contractions??? FTM

So I have no idea what to expect from contractions, what they feel like, when they’ll come....

Over the past week I’ve had constant period-like cramping in my lower back and lower abdomen without my stomach really hardening much but since this morning I’ve been getting sharp period-like cramps in my lower back and lower abdomen that come and go with my stomach actually getting pretty rock hard this time.

I haven’t really timed them or anything yet since I have no idea if they are or even could be contractions but they come on suddenly every once in a while, last a few seconds, and then go away. Changing position or applying warmth doesn’t seem to ease them and they’ve been slightly augmenting in pain.

I’ve also noticed my stomach might be pushing out in a more triangular shape than round when they’re happening?