My partner and I had intercourse 2 days ago, he did ejeculate within me and now I went to go use the bathroom and while wiping there was blood as if I'm spotting. I had my period 11 days ago and I'm on day 11 of obvulation cycle along with that I shouldn't be excited eating my period for another 18 days. No pill or any type of birth control was used at all, what could this possibly mean..?