Pelvic Pains at 15 weeks?

Natalie.
Is anyone else experiencing pelvic pains/uterus pains at week 15? I am guessing it's round ligament pain, but I have no idea for sure because I don't know what it's supposed to feel like. What I'm experiencing is pressure and sometimes sharper pain throughout the day. I called my dr and her assistant said that its probably normal, but I still worry.  Anyone else?