have been having irregular strong contractions this afternoon they last about 30-40 seconds no…

have been having irregular strong contractions this afternoon they last about 30-40 seconds no pattern, had bloody show yesterday rang triage and they said ring back when gets cramping... not got that just pains when contractions come going through my back and bum. don't know if I should go get checked or wait until they are more regular?!?! I didn't even get show with my first I just woke up in major contractions so don't know any different xx