Went off pill for a month and had sex

This past month I went off the pill so I could switch to a different pill next month. On Saturday night I had sex unexpectedly and there was a condom but we kind of lost it somewhere along the way.. He never finished because I told him I wasn't on the pill at the moment and we couldn't find the condom, but I heard pre cum can get you pregnant? I'm supposed to start my period Wednesday so time will tell if I'm actually pregnant but do you think there's a chance I could be? I've been very anxious/restless and I'm trying to relax lol