Could i be pregnant?

I'm so embarrassed having to ask this but what is the possibility of me becoming pregnant? I am on the pill and have been for a month now. I think they could be ruined because no body told me they have to be in a room temp and I live in southwest Texas in a house with poor insulation so it gets pretty warm here and I think I might have left them in the truck for what could have been an hour. Anyways, for the next problem is that 5 days ago me and my boyfriend had sex, we always use condoms and it busted, great! Now I'm stressing out about it trying to find something to ease my mind. Please help...