Implantation cramping?

Chelsea

So at the end of my period I had sex the last day of my period which was the second also baby danced the 5th and the 7 th... the 11-12-13 I had cramps and sore back doctor said it could b implantation cramping has anyone ever experienced this and ended up pregnant also last night I had a dream I took a pee test and It came out positive could it b a sign? My next period is due in roughly 10 days