How did the vet visit go?
As KMG asked, what's going with the cage as we had discussed in the other thread? The best vet treatment in the world isn't going to be able to save your snake if its basic requirements in the enclosure aren't met.
If a PVC cage is out of the budget right now, look at making a temporary plastic storage tub setup with a large human heating pad wrapping all the way down one side and a bit underneath as well, and some PVC pipes for branches. A blanket over it all will help get the ambient temperature, as well as give the snake extra security as well. It's stressful for a freshly wild caught snake to adjust to captivity, and the less he sees of people the better. This would be a cheap, easy, and effective setup and can always be re-used as a backup enclosure as well in future.
Glass tanks don't hold heat very well, so unless the whole room is heated to something like 78 or higher, you're going to end up with either overly hot hot spots and/or overly cool cool spots if not overly cool ambient temperature as well. Your tank is also too small for your snake to properly thermoregulate. He needs enough space to be able to fully coil at the temperature range of his choosing, by moving horizontally across the enclosure. Arboreal snakes aren't always able to make good use of a vertical temperature gradient. You need ambient temperature to be 82-84, with hot end 86-90. I would avoid night time drops right now with an RI, so you don't want any part of your enclosure below 80 at any time. A good temp gun is less than $20 on Amazon.com; this is an essential tool for keeping reptiles and well worth the money.