Hey I'm wondering if I am realistically at risk for catching anything. I hooked up with a guy and there was some mutual masturbation. He tried to go inside me but I stopped him because we didnt have condoms. His penis never went inside my vagina but he did touch the outside of it with his bare penis and rubbed up against it for less than a minute. He then ejaculated on my stomach. Should I even be worried about an sti? Pregnancy isn't a concern as I am on birth control.