Firstly I'm fairly sure that counts as a healing complication - so if you haven't already done so, I would at least inform your surgeon of the development.
As regards healing time it really depends on so many things, size, depth of dermal erosion, that without looking at it no one can say.
What can be said is that to enhance the healing rate you need to keep it clean and as dry as possible, and as open to the air as you can - so no ultra tight fitting undies etc...
I personally would also bathe the affected area in a dilute iodine or saline solution, to help promote healing, but don't do that if you have an iodine reaction, and absolutely don't use any strong antiseptics or indeed talc, as they will do more harm than good.
I'm guessing if you are worried enough to be posting about this, then the affected area is probably reasonably large, in which case the healing time is likely to be measured more in months than days. Also while you have an open wound you should be VERY VERY cautious about sexual contact with anyone you are not 100% familiar with, as your risk of contracting an STI from an infected partner will be pretty damn high until it heals.
So do take a lot of care.