Last week Saturday (11/12) I was sick, I took my birth control and not long after I threw up. I took my next day active pill as instructed on the manual. It was my last active pill of the month and I continued on to take my break pills. I’ve been sexually active since then. Usually on my break week I get my period which is usually light and last a day or two. But this week I didn’t get it. Should I be worried or is this normal?