I've never had any BC until last year cause my cramps interfered with my school attendance. I don't know anyone who uses BC and I just a little worried. I haven't had my period in two months, last time I was sexually active was close to 5 months ago. Is this long absence okay? I've had a period on schedule (for the most part) for about 11 years. School stresses me out a lot, could that also be a factor?