Chances of being pregnant

Aiko • Mommy to a baby in heaven <3
On Feb. 12 I had sex, and my bf was wearing a condom and he did cum. After we just relaxed for about 20 minutes and had sex again but that time we didn't use any condoms. But wouldn't the sperm still be on his penis or would it have died within that 20 minutes? We did the same thing again yesterday too. Do I have a high or low chance of getting pregnant?