I'm not an expert, but I think more info would be helpful. What type of mushroom is it? Did you purchase it, or make the spawn yourself?
If it's wine cap or blue oysters it's probably fine, they're known for being very hardy. You could also try adding some to a small bucket of substrate and checking on it in 1-2 weeks to see if the mycelium is developing.
“There are no words to express the abyss between isolation and having one ally. It may be conceded to the mathematician that four is twice two. But two is not twice one; two is two thousand times one.”
― G. K. Chesterton