False contraction or just a cramp?

This happened half hour ago, but I was sitting on my couch recliner and it sinks in and I had been holding my pee in for a bit cos I was going to bed soon anyways but as I was trying to lift myself up, which takes a bit of work cos I am big and the sinking in the couch is bad, I just had a cramp in my lower left pelvic area. Me being a ftm I'm thinking oh s*** I can't be starting contractions now I'm only 34w! I start wobbling to the toilet hunch over in pain (pain being a 3-4 out of 10) I quickly get on the toilet and do my business, and check if I'm actual peeing or my water is broken, but it was pee. (Sorry tmi) the pain went away thankfully after I peed and did the other thing 😅 and the pain only lasted 30-45secs. Haven't cramped again, it's been 40 mins since. Although I still can feel where the cramp happened. Has anyone else had this experience???