I've done my fair share of wild mushroom picking/hunting the last few years, and I'll tell you this: Don't eat that mushroom. You are lacking a lot of information for anyone here to try to give you a proper ID. Best thing you can do is surf over to shroomery.org and post a pic in there, but be prepared to disclose more information, ie, where YOU are at in the world, the general habit/terrain of the mushroom, proximity to bodies of water/streams/rivers, growing in field or forest, substrate the mushroom grew from, temperatures, spore print, etc etc.
GL