Expert answer:
In fact this is usually due to trauma in the vagina, it is quite common to occur in the first few times that the woman has sexual intercourse, if it is only an isolated case (one time) do not have to worry, if it keeps repeating go to a gynecologist. Another important thing to remind you is that now that you have started dating you should go to a gynecologist to talk about contraception, annual cervical cancer screening, among other things.
