Can I be pregnant? Please help!!

So I had sex with this guy in May the 10th (yeah, bad timing...) and we used a condom on the “first round”, and after some more foreplay we had sex again however this time was unprotected... He wasn't inside me for a long time though, and after I orgasmed I tried to blow him but he said he was “dry” due to two previous orgasm (neither of those inside me). 
We slept and when I woke up there was a little blood on my underwear and I checked my calendar and it said I was ovulating (my last period at the time had been from April 29, to May the 5th), so I ran to the drugstore to buy the morning after pill. 
I just had my period on May 26th. But I'm still a little nervous because my breasts have been a little tender lately... Do you think there's a chance I might be pregnant or am I just losing it? 
Please help!!