My girlfriend has been a birth control called cryselle for 2 yrs & just went off. She hasn't hadperiod in 2 months (she's not pregnant) is this normal?

Doctor can evaluate. There are many causes for irregular menstruation. One common one is polycystic ovarian syndrome (pcos), a hormonal imbalance along with cysts in the ovaries. Though most irregular menstruation is not immediately dangerous, any woman who does not menstruate monthly should consider seeing her primary care doctor or an ob/gyn for evaluation.