Intense Braxton Hicks ???

I’ve been getting some pretty intense tightening & cramps in my entire stomach area. Today it’s been on & off for about an hour & a half. The cramps will make my stomach really hard & hurt for a minute or so, then go away for a few minutes & come back just as hard. The ‘contractions’ are making me nauseous. Is this just really intense BH? I was told they don’t hurt. FTM 30 weeks.