I had sex the day my period went off?

Totally normal.

when you have sex your uterus contracts which can push the last bit of blood out.

happens all the time.

Just when you think its over, sex will bring it back.

Same thing happens if you have sex the day before your period.

That's one great thing about condoms. No mess for him to get all squirmy about!

Maybe you just had some blood that you didn't get rid of cause when you have muscle contractions sometimes you bleed a little bit or when you exercise and bend over a lot. If you still bleed after sex later on I would go to the doctor and see whats up.

You can have sex on your period with no worries (just keep using your regular form of birth control). It won't hurt you or your partner. It's just messy. The sex might just have triggered the last bit of blood, or you might have rubbed something raw if you weren't lubricated enough. I wouldn't worry too much about it.

I find having sex on my period helps with my cramps, but usually it's hard to get in the mood when you're uncomfortable.

Sometime it is just that you had a pause in your cycle. It happens to me all the time. You think its over, but it has got a little or even another day left. Completely normal via my OB/GYN.