I do! I posted about them a while back, and did a little more research as to what type they are - mine are field mushrooms and I have been eating them for breakfast for the past week or so
I found some yesterday when I brought them in, same as you i never had this problem before! At the moment I am just taking them out as I see them! Just to be on thr safe side, not sure if they are dangerous. But im moving in a week, so haven't really looked into it that much.
We have them too and ours are field mushrooms. We have not had them ever before but apparently it is a very good year for mushrooms "in the wild"! I didn't know if they would upset the horses so have been chucking them in the barrow when poo-picking.
We have hundreds of field mushrooms growing at the moment, and they are delicious!!! As long as you can peel them (the top layer) easily then they are fine to eat!!! YUMMY! They taste sooooo much nicer than supermarket ones.