I've been taking ortho try cyclen lo for about 6-7 years and in the last two months of pills I've noticed breakthrough spotting while still taking the active pills. I haven't missed any pills and this month on week two active pills I've been spotting brownish/pink on and off the whole week. About eight days into the new pack I had unprotected sex, could this be the cause? The birth control should of protected me right? Or is it possible that I need a higher dose of hormones because I have been taking the same one for so long and my body's adjusted to it now?