I've had this plant for 3 years. When it's 'happy' it stands maybe
six or seven inches tall and its pot is a foot across. Two days ago
I noticed that the plant limbs were limp. I put some tap water into
a container and let it sit overnight. Next day I water the plant,
including some Miracle Grow. I put the plant in a room with more
light. Now there has been no change in the plant's condition. It
is still limp but it is also just as green as ever! I've never
seen a plant act like this before.

I think it's "pothos epipermnum aureum". Any ideas?

-McDaniel