Possible overheating?

[FractalVision]

Hi everyone,

I'm feeling quite anxious. Basically, I had set up a new 4ft viv for my bp (it will be my boa's when he grows into it).
I put a 150watt ceramic bulb in, and so adjusted the thermostat accordingly. I noticed, what with the bulb being more powerful than my usual 100watt ones, that it would fluctuate 3-4 degrees when it was being turned on and off by the stat (I do not have a pulsestat, which I hear is alot better for bulbs).
The basking spot would go up to 33 degrees celsius, but because I am always paranoid when I put my snake in a new viv, I also put a thermometer inside his plastic hide which was only showing 24-25 degrees.. Well, being that it was that cool, I thought that it was fine.

He seemed active, and explored his viv.. But about an hour ago when I took him out, he seems a little different. Though he is still active, and his tongue is flicking, he does seem slightly slower. Not so much that my friends/family would notice, but I notice it. He seems slightly confused at times about which direction to take etc.
Silly as it sounds, but I had a nap earlier, and I dreamed that he had a stroke - half of his face drooped as it does in humans. I thought this was my subconscious just reflecting my paranoia/concerns, and just saw it as that. (this was before it all happened)

I am upset, because there is definitely a difference in him. I'm terrified that I've caused some brain damage or something. I thought I'd offer him a rat, just to see what he would do, and I was very pleased to see his head pop out in a normal feeding response. He has now eaten the rat. I just wanted a sign that he will be okay.

What with the new bulb, it did take a bit of messing about to set it up. I thought I was doing the right thing. Please, has anybody with more experience seen this happen with their snake as a possible result of overheating, AND did they return to normal? I just want some hope. I feel really worried that I have harmed him.