I'm still thinking and praying for both you and your little man. :( I hope he makes a full recovery, but even if he doesn't, I know that he had a wonderful life with you and that is really what matters at the end. You loved him and cared for him and did everything anyone could have done. I know they appreciate their care, any creature does.
Sending positive thoughts your way, if there's any possibility that they might help, it's worth it!
Good and bad updates. He still ignored food up until today, when he ate 1 bloodworm. We're trying as I type to get him to eat other things. :/ That's the good part, that he finally showed some interest in food today. The bad part is that he got scared during the water change, and moved about in a way that looked scared but not harmful-- but the place where he hit his head the first time is now red like blood :/ Doesn't look like he'll eat anymore, we'll keep trying.
Things were looking really bad last night. :/ I tried turning on a lamp to take a picture, but he started twitching, so I had to turn it off. He did that a couple of times last night, it's so scary.. Anyway, he follows the food now, but then ignores it and swims away instead of going for it.