I have been on the pill four a little over four months now. In Feb 18 I had a scare. He put his penis in me unprotected once or twice. I had my period a week or so later. On time according to <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a>. It lasted 5 days. I freaked out until this period. Which started on time and I'm on the fourth day and it's pretty light. The first two days were heavy and the third day was medium flow. I took a pregnancy test the day before my period was due this month. It was negative.