Is it bad to have sex with two girls back to back unprotected? I am safe from any STDs, and so are they, as they have tested themselves. Yesterday I had sex with one girl unprotected, and today in the morning I had sex as well with a girl unprotected. Am I safe? Is there like a certain time table before you can have sex with another person? Please help, I am extremely anxious and panicking. Is there any sort of time frame that you have to wait?