I had unprotected sex with 2 shady sex workers yesterday where I kissed, performed cunnilingus, recived oral sex on my uncircumcised penis and had sex without condom. My penis size is small (3.5 inches when erect) and yesterday as I was not in complete mood my erection would have been 2 inches max when I ejaculated inside. I’m saying this because I don’t think my erect penis entered too deep into the vagina. But I’m worried I may contract HIV and other STI’s as this is the first time I had sex without condom and received oral sex without condom. What should I do? Should I take precautions such as PReP?