Hi I started my period on July 7 I finished my period July 12  I then had unprotected sex July 13 and my boyfriend ejaculated inside me. After that happened we went to buy the plan b pill. July 17 in the after noon I saw that I bleed a bit. It seemed like if I got my period again not sure if this is spotting but now today in the morning I am still bleeding. Does this mean I'm pregnant?