is pregnancy even slightly possible without penetration or vaginal insertion?

Facts:

Age 22

Sexual past: still a virgin.

Details: Have had vaginal contact with an unprotected penis. Bf and I rubbed genitals together without insertion or penetration on May 16th. He ejaculated around my anus after intense foreplay. I started my last period on June 4 which lasted for 5 days. My cycle hits like clockwork every 21 days and Ive never been late. Today is July 2 and still not menstruating.

Question: Is it possible im pregnant? What is the likelihood of his semen or even precum entering my vagina without sex but close contact? Soneone please help!!!!