Fast question: contractions

So i've been feeling like menstrual cramps, a bit more diffused on my abdomen, mixed with sharp pain down low, for a few days. But now they are more often. I've tried to keep track of them but i know when they start but not when they end. They start sharp and then fade but keep hurting for a while. The thing is they are painful but not as strong as I was expecting, and i was in the hospital two days ago bc of this, and lost my mucus plug the morning after. Now i dont know if i need to go to the hospital bc they dont feel painful enough, although i am getting them more often. Have anybody had a similar story or knows better when to go to the hospital?