Could be dehydration or something worse. I wouldn't take any chances. You should go to the hospital asap. Better safe than sorry
I had this one night. I didn't go into the hospital but I drank lots and lots of water and it helped a lot. I was just dehydrated.
I was having the same problem and at first thought nothing was wrong. I would go into the hospital because I quickly found out that the pains were contractions. It's caused because of dehydration. This makes your uterus " upset" and causes you to have contractions! They will rehydrate you and give you a shot to stop the pains and will check to make sure you are not dilating!