Weird question unsure?

Ok I'm 16 and I met this boy I used to go out with a while ago we met in the town, he asked me to go back to his house so we did and both drunk we had sex ( well I think we did) it was painful as he kept saying I was too tight he tried to put it in the next morning but couldn't by the point I was in agony so couldn't go through with it I don't remember if we had sex that night I'm positive we did! Anyway I was ovulating my chances were high and nothing was used even if he had himself inside me trying to put it in for a while could that get me pregnant I'm not worried as I "think" my chances are very slim since he didn't c****m just want to know it happened last week?