Unprotected sex, was late to take pill, pregnant or not?

Okay so I've only just gone on the pill and have been taking it around the same time everyday I went to a music festive with some friends and I took the last pill in the packet and thought I would be fine till I get home the next day During the night, I had unprotected sex with a boy I have feelings for, he came inside of me after telling him not to. I didn't get home untill late in the afternoon the next day hours after I usually take the pill, like 5-7 hours later I believe and now I am affraid I am pregnant, could I be?