Swimming?

Ok me and my boyfriend are competitive swimmers. Today at practice we were fooling around and he got hard and after practice we fooled around again. Later he texted me thinking he cummed a little. All that happened was I rubbed my pussy on his lap and he got hard and he kept grabbing my butt and touching my clit. After we finished the practice he started touching my butt and boobs but then he put his hands between my legs and started rubbing my pussy until he was hard again and we weren't alone anymore. Is there any chance I could get pregnant from his sperm in the water? I don't think I was even near him when it happened.