How can you tell?

I’m a ftm, just wondering how can you tell if something is normal? My obgyn is so hard to reach after hours. I’m 15 weeks, I have like an uncomfortable kinda ‘pulling’ feeling in my Vagina maybe? I don’t know how to explain it. I got this when I was on my period but it was a lot worse. It doesn’t hurt but I notice it sometimes. Happened a couple times durning the first trimester as well