Pelvic pain

Lauren
This may be a dumb question but I've been having pain in my pelvic area for a week or two. I can't quite put my finger on what it is. Sometimes, it feels like it's my bladder, but I'm not having burning during ruination or having to go that frequently. I've also had sporadic back pain. I'm mid-cycle but I don't typically experience pain from that. I do have bad menstrual cramps. 
What doctor do I go to to find out more about what's going on?