I had my CO2 tank and regulator in the fridge with my kegs, not connected though, the main valve was off and when I openned it, the lower pressure gauge which supposed to be somewhere in the 30psi (I was previsouly carbonating a kep) jumped to end of scale and safety valve openned. I quickly closed the main valve and took the tank out. I tried to play with the regulator adjustment and it did nothing. At some point it started regulating. I'm scared now, should I replace the regulator or is this something related to the fact the tank was inside the fridge at around 35F?