You always have Neel Gap to mail stuff home and Winton who will help you with your pack. Better than those hiking SOBO, I must say! But it might be good to post a gear list to eliminate ounces that leads to pounds and can make the journey more enjoyable. If you just want people to make you feel good by saying don't worry about your gear, well ok, but the feel good words might not get you far when you are dragging up Sasafrass mtn in rain with a 40 plus lb pack soaking wet. And maybe some of fears can be alleviated by listening to those who have actually done the whiole trail. I mean at this stage you certainly can't replace all your gear. But you can work on a little of it. 2 weeks is still good time to make a few corrections, if you want to, that is.
As to the hiker wearing 2 plus lb boots because of knee and ankle trouble - it will not solve it. Get fitted properly, wear the right foot wear AND insoles, exercise weak ankles with ankle strengthening and a wobble board, and for knee pain, consider a cho pat duo knee brace and watchng your pack weight (like skipping the heavy pumpkin bread and having your leg lift a 1 plus lb boot up a hill every time you stride). I have both ankle (severe) and knee issue on one leg. I went to properly fitted trail runners through a running shop with proper suerfeet insoles for support of the arch, ditched my 7 plus lb pack for a much lighter model, got a knee brace and have compeleted the trail NOBO and nearly SOBO.
There is wisdom in hearing and maybe heeding words from those who have actually hiked the trail trenches, so to speak, and who have been out there day after day for months. And who had to overcome severe obstacles (I had an MD tell me I'd never hike again after my severe ankle sprain)to see a dream reached. it not just words. Its action too.
God speed