Contractions ?

This might sound a little stupid but I wanted to get some advice before I call l&d and sound stupid I'm 22+1 weeks and today I started feeling tightening inside my woman part its not painful but I've been having it for a few hours now it comes and goes every few minutes could it be contractions ? I know I sound stupid but it's never happened I thought contractions are supposed to make your stomach hard from what I've read I'm confused my so keeps telling me we should go so they can check me but I don't want to go wast their time because I know they will send me to l&d even tho I'm not 24 weeks yet