Implantation Cramps???

Kelsey
Has anyone felt implantation cramps prior to getting your BFP? I'm 7 dpo today, and am cramping pretty bad. Doesn't feel like AF cramps though, and AF isnt due until Thursday at the earliest (12 dpo). I haven't had any spotting, just these cramps today, and had a sharp pain in my right side twice yesterday (6 dpo). Just wondering if anyone else has felt this, and could shed some light! :)