False contractions

This is my second pregnancy. 36 weeks now. Yesterday, I had what i felt was braxton hicks contractions. Tightening at only the abdomen. Didn’t felt it on my legs and back. What was weird that it occured very frequent with inconsistent 2mins-30mins intervals lasting abt 25secs-40secs. I originally had pain in pelvis but yesterday was worse. Weird thing is, I had from evening time abt 6pm til abt 5am & then when I wake up this morning, I felt just fine. I honestly thought yesterday was go time but i guess not. Anyone had this kind of experience before?