On the last day of week 3 of my pack, I had sex. Right after the sex, I started bleeding which turned out to be a period for a few days. I usually get my period on the third day of placebo week so I was surprised to get my period at the end of week 3. I decided to start a new pack instead of taking a placebo week. I was told I may have irregular bleeding for not taking a placebo week. Towards the last day of my period, I had sex. I started bleeding right after again, which appears to be fresh, new blood and potential period again. Does this seem normal or abnormal?