Okay, so I've missed my period for 3 months but every month I still get cramps and mood swings a typical period stuff but I have got it. Sometimes my hips like lock up and I have to pop them or stretch them to stop the pain. And sharp pains in like my sides kinda where my ovaries are. I have gained any weight. My breaststroke haven't gotten bigger or tender. I've taken pregnancy tests and they've been negative and everything I've read so far that's been the same says they weren't pregnant. Does anyone have any idea what's wrong with me?