I have a stain on my ceiling right below my master bath. It's not dripping or soft where the stain is, but it looks like it's getting bigger. I've gone up to my shower and cleaned out the drain... yuk! Could that be causing the spot? Standing yukky water in my shower drain? I've poked a small hole into the stain to see if I can get some kind of water out of it and it seems to be dry and it was a little difficult to get hole started. Any thoughts?