Hey friend definitely 1-2 weeks at most. You look really close to finish.
For the fungus gnats, it won't matter much for this plant, but if you have others around then that's a problem. They'll just keep coming back if you don't get it handled.
Are you in the u.s? If so please go get something called mosquito bites, at a garden store or home depot type place. Sprinkle all over top of the soil, then smash a bunch and put into a gallon of water, let sit for a day and then water any affected pots. Let them do a full dry cycle...like almost drooping plant dry. And hopefully that'll kill the larvae in the soil.
As for the flying ones if you could pick up a bottle of Dr Bonner's castile soap and make a squirt bottle with 3/4 water 1/4 soap its a very effective but non damaging bug killer. Those are the methods i had the best luck with.
Jorge cervantez also does a thing called a bud wash using a tub of water with hydrogen peroxide in it and dunks the buds before drying, its handy for washing away PM and some bugs.
Good luck and happy trimming. ✌️