My bf & I had sex on the 26th of july, we did it without and with a condom, but he still came outside of me. It was the second day of ovulation. My period was supposed to start on the 13th of august, but it hasent the app says im 2 days late. My cycle used to be 25 days each, but in june i took a plan b to be safe. After that my cycle lengthened to 28 days. Now im on day 30 hence why im late 2 days. Could this still be because of the plan b or should I worried?I havent taken a test but idk where else to post, im 17 btw.