If you are no a 28 day cycle, then you ovulate around the 14th day. This said, your cycle may have change to be longer, or shorter than you expect. For this reason, no one can be certain of the exact  ovulation day.  If you are 100% sure and can predict that this cycle of yours is 28 days, then you are safe on day 5 of your cycle.    If you did get pregnant on day 5 of your cycle, then the length of your cycle this month would have been 19 days only. 

I hope this makes sense.  But the best way to be sure is to take a pregnancy test on or around the 28th day of your cycle. 

Good luck.

The only way you are going to know is if you buy a test and do it. You can get pregnancy test from most supermarkets and chemists.

But if you have sex then you can get pregnant no matter what your cycle is.

anytime you have sex unprotected without birthcontrol you can fall pregnant. maybe get a home pregnancy test to be sure

xoxo

 I got pregnant 2 days after my period with my second..  We weren't technically trying just yet, but it happened..  So yes..  You could definitely be pregnant..