I've been lurking and stalking this forum for the last 3 months but your query finally plucked up my courage to respond!
I had a NETZ and hysteroscopy procedure (NETZ similar to LLETZ apparently) the day after you under general anaresthetic too!
I am also still bleeding (first week was very little, second a little more and this third week has been more gloopy (sorry if TMI!) when I go to the toilet. Like you, I am not sure if some of it could be a period because mine are so irregular (especially since having an ectopic pregnancy in February).
The poor colposcopy nurses have been getting a call from me each week but said not to worry about any bleeding until after 4 weeks or if you are soaking throgh a pad every hour.
So, basically I haven't helped with your question but I just wanted to say I am in exactly the same boat as you and I have found some comfort in knowing I am not alone!
Hopefully we'll both stop soon!