Having sex while having a period is generally safe. Sex is absolutely safe if it happens at the beginning of the period. It could be unsafe at the end of the period if the period lasts longer and the cycle is shorter.













In your case (had sex a couple of hours after period had begun) emergency contraception (“Plan B”) was probably unnecessary.













Any normal period occurs when estrogen levels drops at the end of the cycle. The “Plan B”-pills contain high doses of estrogen so it is expected for a normal period to stop when the body gets enough estrogen hormones from outside.