help?

Okay so I had sex for the first time on Sunday, and at first my boyfriend did not masterbate beforehand and put the tip in for a few seconds, not all the way because we were interrupted, and I will admit he was precumming a bit.(I know stupid of us) but when we had sex we did use a condom. And I also wanted to add, my period is five days, and it ended on Thursday. People say it's still bad to have sex after this. I don't understand because you can not get pregnant if you do not ovulate, eve says I do not ovulate till the fourteenth of October. Is it possible to get pregnant?