Hi there I understand your concern and anxiety....irregular periods may be associated with excessive bleeding leading to low levels of haemoglobin making you symptomatic..... You can have your CBC or blood count taken just to know your condition...A lot of girls and women have pre-menstrual symptoms, most of which are related to hormonal changes/imbalance, and they disappear with the onset of menstruation....Consult nearest gynecologists they will do the needful.