I was dating a guy and we engaged in some heavy fooling around. Neither one of us had a condom so I decided not to have sex. He was masturbating while I was fingering myself and he than pulled my fingers out of my vagina and proceeded to finger me. I am really worried that he used some of his precum as a lubricate before he started fingering me or some precum might have gotten on/in me vagina. Is this high risk activity? Should I be concerned. I am unaware of his HIV status. I will get tested, but would like to know if you think this poses as a serious risk for contracting the virus.
thank you.

Mutual masterbation is considered a safe act. Also, for HIV to transmit, it requires that the virus enter your blood stream, wich would be pretty unlikley through a small amount of precum.