Lower abdominal/pelvic cramping

Bluelakes_2014

I'm 5-6 weeks a long...(not exactly sure because I have always had irregular periods because of minor PCOS and I wasn't able to pinpoint when ovulation happened this last cycle) and won't have my first appointment with my OB until September 15th. I have been having twinges and minor pains in my lower abdomen/pelvis since about a week before I got a positive test. I'm guessing some of that was implantation cramping. Now I am experiencing what I imagine to be ligament pain, but also like a period cramping/burning/tight feeling in the same area. Is this normal pain from all the body changes going on or something to be concerned about?