Every 25 to 30 days my girlfriend finds some small topic or something ive done and starts chewing me out for it. She won't stop yelling at me until i get so frustrated that i then tell her off. She won't stop until she causes a train wreck of our relationship. I can set my clock by it now it's once a month sometime around her PMS cycle. It's bad and she really in her mind thinks that i'm the bad guy. She at time will sleep and sleep and sleep, other times she will clean her closet out until every colored shirt is in the right place, other things she does is shop all the time three times a week or more plus she shops on the computer too? What's going on with her, thing yelling at me start with no warning at all one minute she's fine the next thing i know we are having a battle and she's telling me it's over, just to make up with me a week later. I can't handle this roller coaster what's going on with her?  She takes celexa and has depression is she bi polar? what causes these dramatic huge swings in her well being?