Wait!!Please follow this...it will save your plant
1.Dont think of repotting.Moths don't care about pots as far I experience goes...small one it hates...big ones make them unhappy.
2.try to get some mosses out near to the roots.let the roots get enough air...I use to keep them near to a slow running fan..these phals love light and air movements around some of their roots.don't bother about the leaves turning yellow,they will turn back to green once it gets right condition.So have patience,these orchids are really strong ones..

Your plant is not in ICU,but near to it...
If the condition get worse...leaves tilting...full yellow....
I would do the following to save my orchid

1.Cut the bloom...if often surprises the plant but will save it at least.
2.Get the plant our of the pot,check the roots...don't cut them,get some toilet paper and try to get some moistures out.I use to rap them if possible some health roots with tissue or toilet paper and keep it for 2/3 hours with some support to the plant so that it stays upright..
3.After 2/3 hours unwrap those roots and feel it...if your feel they are hard,little moist your orchid can well be saved...now..look thoroughly in the roots...check the roots which have turned black,cut them.
4.Get some turmeric power fro kitchen and apply them over those cut areas..keep the plant for another 30mins like this before repotting.
5.Get some barks and mix it with moss and plant your orchid..
6.Dont feed our orchid...
7.Check the roots regularly if they look healthy...check the leaves,if you can see some green.
8.Feel the roots.Touch them,if you find them completely dried up,add some mineral water under room temperature..

I do the same thing in my ICU and has never failed in last 20 years...
Let us know how it doing...