Injuries, Running and Thoughts on KT tape...

I've had what I believe is Plantar Fasciitis for about 2 months now. I signed up for my first half marathon a few months back and immediately started planning out my running training. I got myself up to 6 miles (which was still at the beginning stage for me since I had already been running a lot) and somehow strained something in my ankle or arch. I've been stretching it, massaging it and icing it for the past 2 months and taking it very easy on the running. Literally for the last 3 weeks I haven't run at all. I've been doing stair climbing exercises in replacement of my running cardio because just about any running for more than 1.5 miles just aggravates the injury. It's been a very frustrating road and I am losing patience with it... especially since my half marathon is in only 4 weeks, and I still can't run further than 3 miles without pain.
So, that led me to KT tape. I've seen so many fitness bloggers and instagrammers and even people at the Spartan Races wearing this stuff and swearing by it... so I decided to give it a try. Heck, if this stuff could help me cross the finish line at my half marathon I was more than happy to spend the $19 to give it a go....

Here is my first attempt at wrapping for Plantar Faciitis according to their website video tutorial. At least it looks cute in pink....

But, I didn't notice a difference. Not a single difference. In fact, about 2 miles into my run, I even started to feel the tape peeling off... separating from my skin... kind of like when a bandaid gets wet. Once that started to happen all the support the tape was providing went out the window, along with my hopes that this was really the answer to my problem. By mile 3, the pain I usually feel at this distance was very much there in my ankle and I finished my 5K run disappointed. My ankle is still hurting in the SAME place it usually does after about 3 miles... tape or no tape.

Needless to say I am a little disheartened at this point. I don't honestly know how I am going to be able to run 13.1 miles in just 4 short weeks, I may actually end up having to transfer my registration to a friend, since I don't want to end up seriously injuring my ankle just trying to finish. I don't know what to do and it is super frustrating. I will continue to give this tape a try, at least until I go through the first roll. May as well use it right?

Has anyone out there ever experienced an ongoing injury like this? I don't like resting, and not being able to run is driving me crazy. I feel like I've tried everything. :(