Yes, i have a dwarf gourami in an uncycled tank who is now exhibiting these EXACT symptoms.
I tried putting salt in the tank (1tbsp per gallon), and the temperature is at 82-3 degrees. I think he is going to die.
I'm not sure why your molly has a parasite since you don't have a new tank. Did you recently add some new fish?
Im just feeling guilty about my gourami. I bought him a whole tank for himself because there were aggression problems with the gourami in my 10 gallon. I couldn't force myself to bring them back to the horrendous conditions of the petco across the street (not all petcos are bad, but the one that i live across the street from is NOT a good one). i had no idea what the nitrogen cycle was when all this occurred. Otherwise, i would just have waited until the tank had finished cycling to add fish, even though it takes for *******ever for a tank to complete its first cycle. The gourami in my 10 gallon is doing fine, but I guess he is just naturally stronger. Wow, sorry to ramble on about this for so long. I am going to give this subject its own post.