Im 16 years old and sexually active with my boy friend. For the past week my breasts have been feeling like this. I don't like wearing a bra now or having my boy friend touch them. My last period stated on 15th of july till 17th, my cycle is normaly 28 days. Im currently going through my fertile time of the months. I was just wondering could i be pregnancy or that im due on soon that im fertile? Please Help.