Do you go for regular pap exams? Definitely all women should. And if you haven't had one in a while, schedule it and mention this situation. Is it bright red, pink, brown blood? Just asking because that can help understand if it is old or new bleeding. Typically if it is just a bit of spotting, it is nothing to be concerned about and would likely be due to the muscle contractions of orgasm. The cervix can be very sensitive and is vascular. It also could be slight bleeding due to ovulation and not period depending on where you are in your cycle.