How long after your period can you have unprotected sex?

you should not have unprotected SEX Period.No matter how long you can still get pregnant and If you have unprotected sex you could get an STD.

I know I was married to my first husband for 3 years and he cheated on me with a woman that had genital herpies and low and behold I got it because he had unprotected sex because he did not like condoms.

so unless you are looking forward to getting pregnant it is said to be 3 days before and 3 days after your period to get knocked up.