well If she is very pale she is definitely stressed, could be ammonia; corals will close up when there is excess ammonia present in the tank. can you heat up the salt water quicker and get her in there tonight. If she does have an internal parasite you do not want it infecting the rest of your tank. is her poo stringy that is one of the signs internal parasites. cloudy eye is poop eye easily cured and may go away with the other treatment.
can you post a pic?
can you post your peramiters?
what size tank and the equipment you are using?

Bill