Cramping for two hours straight ? Help please !!

I’m 14 weeks and tonight I’ve been cramping for 2 hours straight like period cramps but no bleeding! I know cramping is normal but it’s never lasted this long. I’ve also lost 3 babies so I’m so nervous. Should I go to ER ? Or wait it out. I hate going to hospitals but will do it for my baby. Called my on call doctor and haven’t heard anything yet. Just looking for some advice