Yea definitely invest in a Hydrofarm thermostat. It is easy to use and set up.
It is definitely a life saver. You can set the temp and it will keep the temp there varying +/- 4-5 degrees. But it's so comforting to know your snake isn't sitting on a heating pad that is 120+ degrees! Yikes!
I'm glad you took the snake to a vet. Way to go! Keep us updated.