I'm having some concerns over a missed period. First off, I am on birth control and have been on it for over a year. I have not switched prescriptions. This month, I missed a few pills and had to double up (I believe on two separate occasions). I don't remember which weeks but I think one was between weeks 2/3. I have been sexually active during week two, and during my placebo pills week. I have always used a condom when having intercourse, as well, just in case.
I know that pregnancy is unlikely, because I've used backups and I'm on the pill, but I did mess up a bit this month. I just wanted to see if anyone could shed some light on this situation.