Thrashing around, not eating, red veins all over body.

My axolotl seems very sick. About 5 days ago I was doing a water change on my tank and when I put him back in, his gills started twitching and he started darting around trying to jump out of the water, thrashing around and banging his head on the glass. It looked like seizures. I took him out of the tank and got him new water and put him in a smaller container (temp is kept 66-68 degrees). He seemed to calm down a lot. His gills had immediately started to curl away from his head and lay down flat against his back. After a few days in there I decided he needed to stay out of his tank longer so I got a bigger container yesterday from the store and after rinsing it out and acclimating him, I put him in and the thrashing and seizures started again. Even biting his tail. Tonight I checked on him and he's still biting at his tail but now he has bright red veins all over him and is refusing food. Today is the only day he's refused food completely, he's not even lifting his head at it. I can't see any fungus on him so I have no clue what this is. Please help! Ps. I have always conditioned his water and it is kept below 70 always.

I can't imagine what it is unless somehow the water quality was different or a fast change in temperature. I hope someone else weighs in.

I hope so too. After countless forums read the only thing it could be is water quality or a parasite. I'm going to try a tea bath on him today because if something crazy happened with the water (parameters are fine and I condition it so I doubt that's the issue) it could help soothe his skin. Gills have stood up today but he'll thrash every once in a while, still not eating.

Can you take him to the vet?

I am new to my area and I don't think there's a vet here that does axolotls unfortunately. Yesterday he didn't seem like he was doing well at all but this morning he looks a lot better.