Ok ladies so I'm just about 4 weeks post D&C. Took the top hpt 2 days ago, the second one today. It's clearly darker. And I have been using opks for the past week.. All negative until that one pictured below which is almost positive. Any insight as to whether I should be concerned about retained tissue? Am I ovulating just with a small amount of hcg left? Just wondering why the hpt got darker.. I feel like a new pregnancy is highly unlikely just 4 weeks post D&C. Any advice is much appreciated!