So your nerves are even more hypersensitive to cooler temps now than they were before. According to the source that I follow (which I will not discuss because I refuse to get into a debate about it)........ the hypersensitivity to cold temps is due to viral neurotoxins that are making your nerves more sensitive. A possibility that follows this reasoning is that an underlying virus became more virulent after surgery/surgeries? I understand your problem with mold and very much believe that it is a problem for you but I think it is a trigger for underlying virus to act up rather than a root cause.