Annoying aunt flow.

K
Ever since I started my period in 8th grade it has ALWAYS been irregular. Even being on birth control when It was supposed to prevent me from having it I always had it? Being on the pill, depo and now the Nuva ring(btw I love it) anyways I've always though it may be a weight issue because I'm not a small girl. I'm 5 ft 3 about 180 lbs and it's ALL in my butt and thighs unfortunately. I have my first pap on Tuesday which I'm totally nervous about . Anyone else like that???