I missed my first pill of a new pack -- took it the next day when i remembered along with the pill for that day, later on. On the 10th day I forgot another pill, being late by about 12hrs. I took it as soon as I remembered and followed with the pill for that day as usual. My boyfriend and I had unprotected sex the day after the missed pill. My period started on time, but is light (brown and sometimes slightly red). Am I at risk for pregnancy?