If you have not had sexual intercourse where he has put his penis inside your vagina, pregnancy is not possible. There are other hormonal causes for menstrual irregularities but it is usually just normal variation.
If you are sexually active, chances are you will cross the line one day and have intercourse. I hope you have discussed contraceptive methods with your boyfriend so you will be prepared at that time.
The answers in online forums are for information only and are not intended to substitute for medical advice and care. Please see your personal health care provider for further evaluation of your individual case.
Debbie Miller, RN