I had the same problem with my period for 3 whole months.... now my doc gave me the pill. You should see your doctor if it goes on like this.
Sweetheart, whether or not a guy comes in you is not what determines whether you have two periods in a month. Your period is determined by your own body, the hypothalmus probably and then the ovaries sending a signal to ovulate. And then if you did ovulate, the period comes in two weeks.
Are you asking instead if you got pregnant after the first period and then had the legendary "implantation bleeding?" and this indicates a pregnacy and hence that he must have come in you? Hard to tell. First of all, implantation bleeding is very uncommon, and second, it only is a little dab of blood, nothing you would mistake for a period.