I had a cone biopsy/ cold knife/ and D&C done the last week of March of this year.
I "leaked" all types of stuff: techno colored discharge, stuff that looked like coffee grounds, and very light bleeding, for almost a month. Then it all cleared up....!!!!!!!
My only problem from that was the surgeons left a lesion they missed, and now I will have to have radiation & chemo to get rid of it !!! Talk about sucking the big one......
But, I think your concerns are in the normal range, and imagine your Dr. will tell you the same at your follow up!
Good luck :--)