Hi, I am on the Yaz birth control pill. This morning I threw up a little because of motion sickness, and I think it was around 3 - 4.5 hours after taking my pill. My boyfriend had a vasectomy 18 days ago. Since I already took my pill, I don't have an extra one to take. Would I need to wait 7 days to have sex without a condom, or is the time period/vasectomy enough?