Should I be worried ?

My back is killing me and I’m having cramps but they’re really light and coming in intervals like contractions but I’m not sure bc they’re not bad (like a 5 on a 1-10 scale) , my back is way worse. I’m 31 and a half weeks . It’s 3am and I don’t want to wake anyone to take my to the hospital if I don’t have to . Is this Braxton Hicks maybe ? Idk guys plz help