You said...."for the past day or so my baby panther has been sitting near the top of his enclosure in a vertical position. he was just doing it now, so i snapped a pic. he has been more vertical than this previously. also, his eyes are closed during this, but he will open them to look around if something startles him"...does he gape at all when he's doing this "head's up" thing?
Do you use a substrate in the cage? Did you wash the plant well (both sides of the leaves) before putting it in his cage? Is the poop moist or dried looking with bits of insects still in it?
You said..."he seems to be easily bothered lately. when i mist the leaves he gets much more scared than normal and puffs out his lower jaw area. why should this be?"....I have seen this occasionally in chameleons that are ill.
Could he have aspirated something (taken something into his lungs)?
Regarding the spine...does he sort of sway it from side to side as if uncomfortable or is the shape always the same?
I'm glad that you are taking him to the vets. We can only suggest possibilities here for the most part....hopefully the vet will have some answers.
The following comments are not concerning his behaviour...
You said..."Feeding - gutloaded crickets, one-two a day"...a baby should eat a lot more than that of the appropriate sized crickets per day.
You said..."Supplements - all his cricks are dusted with vit suplement"...if you are talking about Minerall...its a mineral supplement...not a vitamin supplement (aside from vitamin D3 if its Minerall I. If its Minerall O, then it lacks vitamin D3...of course. Is the mineral I or O?
I gutload my insects with an appropriate nutritious diet before feeding them to the chameleons.
I dust at almost every feeding with a phosphorous-free calcium powder. Most insects have a poor ratio of calcium to phos. so this helps to balance it.
Twice a month, I dust with a vitamin powder (with a beta carotene source of vitamin A). Beta carotene can't build up in the system, but preformed sources can.
Because my chameleons don't get sunlight, I dust lightly with a calcium/D3 powder. Vitamin D3 from supplements can build up in the system, so caution is advised.
Concerning lasting until Friday...it depends on what's wrong with him.
I hope he will make it!