I know it's probably nothing but...

I've been having Braxton hicks everyday since I was about 17 weeks and had round ligament pain before that. But last night i was having more of a cramping feeling along with my Braxton hicks. It felt like menstrual cramps and would come and go. Is this my ligament pain coming pack or could it be something else. I don't go to the doctor again for another 2 and a half weeks and I hate calling if it's really nothing. I'm a FTM so I've never experienced any of this and just wanted to know if it's all normal or if it continues should I call the doctor. Oh and I'll be 28 weeks tomorrow.