vs a true maniac

[As Zehn]

I'm probably gun shy after having 3 losing sessions in a row, but I'm leaning towards folding on the flop. The 3 diamonds scare me and you have a draw to 2nd nut low and only low pair at this point with a backdoor str8t draw with 2 players that could be looking for a check raise given CO's playing style.

If wrong hopefully someone will correct me.