New coral beauty has white mouth???

[LeanneP]

I bought a coral beauty recently who is still in quarentine. About a week after I got it, it developed what I thought was ick. It had two white spots on its fins. I left for holidays so I didn't treat it with any medications and hoped that it would get over it. Now I have come back it has developed a white mouth and it has stopped eating. I have been treating it with Lifeguard from Instant Ocean but it doesn't seem to be getting better. Is this part of ick or something else and what would be the best treament?
Leanne