Period sex

Okay so me and my boyfriend had sex on the 4th day of my period without a condom, I know stupid. But anyway he pulled out before he cam and about 30 hours later I took plan b my cycle is about 39 days long and I usually have a 7 day period also I usually ovulate 2 weeks after my period. Also I'm not on any bc. So I wondered what are my chances of getting pregnant? If your going to tell me just use a condom yes I know I need to use a condom, this wasn't planned it was a fling of the moment so just tell me my chance please thanks.