Hello!:)

Ok me and my boyfriend were intimate on the last day of my period wich was april 5th and then on the 11th we used the pull out methout. four days before my ovulation. My period was suppost to come on May 1st... but it didnt. Now i have been having some clear discharge for about three weeks, lower back pain, cramps, and well im 12 days late... could i be pregnant? HELP PLEASE!