Implantation bleeding?

So last month I had my HSG procedure and a couple of days later I got a normal period which lasted 7days. My period isnt due until 2 weeks from now and to my surprise I wiped and had brown spotting but, only when I wipe and there is slight cramping. Ever since My period ended my hubby n me have been doing our baby dance in hopes to get lucky since we were told by my Dr that the procedure helps boost fertility a bit. Anybody else have an experience like this one? I have been testing my ovulation with the strips and the times it has come out positive we have done our part but this spotting simply is discouraging