Bleeding (spotting) and pain ordinarily occurs soon after losing one's virginity due to the hymen being ruptured and torn. So, the spotting could most likely be associated with that. Then again, it could very well signify the onset of one of those infrequent periods. If the bleeding is, in fact, caused by either of theses two scenarios, I wouldn't worry. But, if this bleeding is a cause for concern, to the point that you're uncomfortable with it, you may want to consult a doctor.