How do drs perform a D n C? maybe tmi x?

I had my beautiful baby on 1st oct and i since then i still keep having quite a bad loss down below (sorry tmi) and it hasnt stopped so the gyne said if i have dnc that would clear out any remaining tissue etc and i would stop bleeding. I have heard of dnc before though and isnt that the same as having an abortion (except im not pregnant lol) What will it be like does anyone know, please help im petrified.