She gave me a blowjob and there is pre cum present . then i inserted my fingers inside her mouth then to her vagina , what are the odds of getting pregnant?

Almost impossible: Almost impossible, so the answer is not "none." That means the answer is "yes" but what does that tell a person? It tells a person to get on a reliable form of birth control, if wandering fingers are going to happen again... and fingers do tend to wander. If worried, one can do a home pregnancy test if there are early signs of pregnancy, such as a missed period.