Urgent axolotl

[possumqurlxo]

Hey guys, ive got an axolotl, and she's severely constipated, i need to put her in the fridge however I'm having problems because i cant control the temp in our fridge, the dial is numbered not in degrees, and at its highest its only at 4 degrees, she hasn't eaten properly in 2 weeks and she hasn't pooped in about 3 weeks, or more. I'm trying not to feed her because it will clog her up more however starving her won't help either. I've read the temp needs to be above 5-8 degrees, is 4 degrees to cold????
please help with advice, I'm worried she's going to explode or something, shes miserable and i feel awful because I'm unsure how to fix this, please please help, thanks!