Recap: difficult child started her period about 2 1/2 years ago. She's severely depressed, although she is maintaining well and I'm wondering how much is hormonal. A couple of nights ago, difficult child was telling me that she'll sometimes get really angry for no reason. She feels like she just wants to hit or hurt something. Hitting a pillow is not good enough. I know I felt this way when I PMS'd - I called it feeling toxic - and asked her when her period was due. She always becomes very defensive/embarrassed when asked about that. She refuses to keep track on a calendar. She told me that she hasn't had one in a couple of months which makes sense because she hasn't asked me to buy her any pads for a while. Is it unusual for girls to miss periods like that? I know it takes some time before periods become 'regular', but mine never did. I don't remember missing any, though, until I was a bit older and was also anorexic and had endometriosis. Is this worth a visit to the doctor? I'm thinking this could explain a lot about her current emotional and volatile state.