What Are The Chances Of Pregnancy Through Non Penetrative Sex?

have a question about pregnancy. If i had dry sex with my girlfriend (clothes were on) the went to the bathroom to change boxers and may have just barely brushed the outside of my boxer which was damp but everything was contained on the inside, and then wiped my hands with a towel so my hand was now completely dry, but did not wash them and then fingered my girlfriend 10 minutes later, is that possible pregnancy?