Hello, I'm 19 years old and I'm having some major irregularities. I haven't had my period in about two months and a couple of days ago I started to have a very dull pain in my lower right side near my hip. I have experienced this sort of pain before, but it didn't last for more than one day. I've always had irregular periods, but the pain at my hip is scaring me. When I do have my period, it can last up to about 20 days. Also, I am not pregnant.