Is There A Possibility Of Pregnancy From Unprotected Sex, Even After My Girlfriend Performed Oral Sex And No Sperm Was Left On My Penis?

i had unprotected sex at july 1 but my period starts at july 14, i came outside and white it and then put my penis back in my pants but like 10 minutes my girlfriend sucked my dick so they re were no sperm left on my penis then put it in her, is there a possibility that i can get pregnant?