Sounds like Braxton hicks contractions. Nothing to worry about, just your body practicing. Go in to l&d if you are able to time them at regular intervals, like every 6 minutes or something similar. Try drinking a lot of water, and laying down for a while. Alot of times, this happens because of dehydration
I am 28 weeks. This is a new feeling for me!
Probably the baby is balling up
You may be having a contractions how many weeks are you?