3 weeks and contractions

So I went in today for my second nst and they had to call my doctor to see if I can go home because they saw I was having contractions but I really thought it was baby moving.. now I think it's getting stronger cuz the feeling I've been feeling has not stopped and I'm feeling extremely uncomfortable.. at 1pm when they said I was contracting they were 3mins apart.. now I feel my belly just tight and it feels like baby is rubbing down south... not sure if I should go get checked or not.. trying to relax and drink water