CD 37 after Chemical Pregnancy. Please read

I got a positive HPT December 22, 2014. Started bleeding and cramping on December 26, than took a HPT same day and it was negative. Still not sure what exactly happened my doctor said CP. I started using CB advance OPK CD7. On CD19 got a circle, on CD20 it went straight to a solid smiley face. I've tested everyday from 10DPO to 14DO and got neg HPT. I was very confused. I than thought maybe I'll test again. Started using the OPK again at 32DPO it was a circle, and at 33, 34, 35 & 36 of my cycle I've gotten the flashing OPK. HPT are also still negative please someone help :(