I was on Loestrin 24 Fe for 5 months but my doctor switched me to Lo Loestrin 24 Fe because she thought I needed a lower dose, as I kept getting recurring yeast infections. The first month that I was on Lo Loestrin I got my period, very short and very light for about 2-3 days. This month I delayed my period by a week because I was going on vacation. So when it got to the placebo pill I just took a week of active pills from another pack. However, I just finished my placebo pills (inactive pills) for the month and I have not gotten my period. I only missed one pill, but took it the next day as soon as I remembered and I did not have sex that day or the next. Also, my boyfriend and I do not use condoms but he always pulls out. I took a pregnancy test and it is negative. Is there a chance that I could be pregnant??? Could this just be the result of me delaying my period for a week??