green mushroom question.

[JasonJ]

i have a hairy green mushroom
anyways i've had it for about 2 - 3 weeks.
when i first got it..it turned brown. but was opening up. tripled in size and what not.

today i noticed its back to being bright green no more brown. but not its only the size of maybe a toonie. b4 it would open up at least 2 - 3 times bigger than that. im guessin its doing well coz its back to its bright green color.
any input in this? i havent moved it or anything..still in the same place.