Hi,
I just had my period 1 week ago then 3 days after I stopped I had unprotected sex,
And now I have gotten my period again it's a little bit heavy what could this be ?
:confused:

If you are having a heavy period you are most likely not pregnant.

Id go see a doctor, could be a miscarriage.

It could be from the recent sex, especially happening soon after your period ended... see if it continues. Sometimes you can have off cycles as well. You could become pregnant as well since you had unprotected sex. See what happens when your next period is due.