I had unprotected sex 13 days before I had my period, Could I be pregnant?

Yes, you could.

Even if I had a period..

Was your period the normal flow you would usually get each month? Some women might just spot and think it's their period but in fact they are pregnant, but a normal flow would usually indicate not pregnant. I suggest you take a pregnancy test regardless.

Yeah it was normal !

well you may have had a lucky escape. I would test anyway just to be sure. Sex=babies, don't have sex until you're ready for that responsibility ;)

Please stop using the comments feature and scroll down to the answer box.

Now, you are playing the waiting game and you will have to wait to see if your period comes next month. If not, test using first morning urine.

I assume you ARE trying to get pregnant, correct?