Axolotl is bloated, reddish, and now floating on his side/upside down

[Smdee]

Hey all. I have two 6 year old axolotls. Quetzel has never been the healthiest, but lately he's gone downhill and I dont know why.

Yesterday I noticed he was rather bloated and possibly constipated. When I moved him, he looked really red (he is a leuistic). I took him out of the tank and transferred him to a small container with cold water. It seemed to help, and he passed some feces. I changed his water again this morning and when I got home he was still bloated but seemed ok. Just now i saw him upside down. I quickly checked to make sure he was alive and he is. I don't know what to do except keep him cool. His cloaca seems really swollen too. I'm scared to lose him

 

[Smdee]

I'm also very worried because I'm leaving Saturday for a conference. It's not something I can get out of and I don't know anyone with experience taking care of axolotls or any salamanders. It'd be nice if someone could take him and watch him/fridge him if necessary...but I don't know anyone like that

 

[Hayleyy]

Can you attach some pictures and ammonia/nitrite/nitrate results?
How long are you away for?