Umm.. so that happened.

So me and my daughters dad have been spit up for over two years now and he came down for the weekend to see her.. Well after she went to bed we had a few drinks.. Mind you we are very good friends even after we split and its normal for us to hangout we get along great. Anyways had a few drinks and for the first time in two years yup.. It happened we had sex.. Well we didn't use protection and my depo shot ran out on the 9th and have not gotten my period since. Is there anyway of pregnancy even if I didn't get my period? I've always been regular so i know when I'm ovulating but I just dont know if anyone else has? I wouldn't mind another beautiful baby by him but still. Lol