cramping at 4DPO

Erin • Trying for our rainbow after losing our son at 37 minutes old in December 2015. TTC with high testosterone.
I have had pretty bad cramping since last night, which was 3DPO and continued into today. It is strictly on my right side and I've never really experienced cramps this long and consistent, even on my period! Wondering if anyone else had experienced this. I know it's too early for implantation, and I also took clomid so I'm not sure what this is all about! 
(PS, I did email my dr)