I'm 35 weeks. Who can tell me exactly what a contraction feels like and how it comes about. I have been having tightening in my lower abdomen that comes and goes some are painful and some are not. But they are not yet consistent so I don't feel I need to go to the er. Some of them make me stop what I'm doing and some of them don't some of them make me feel like I'm gonna pee on myself but I don't have to pee I have had this tightening on and off all day. Could it be contractions or what.