Hey Taylor, Phalaenopsis respond very well to being repotted. They will recover fairly quickly.
Phalaenopsis like to be watered well and then never drying out between waterings. Constantly damp is one way to look at it. But as Australis has said, moss is not a good media for beginners to use. They can pack it too tightly, too loosely and it can cause all kinds of problems with the roots. Australis points out that they need air movement. Soggy wet conditions, which is what you have now, isn't good for any orchid!
You can use an orchid bark mix or more moss if you want. Just do not pack it too tight. In whatever media you choose, water it once every 5-7 days depending upon the size of the pot. Water so it pours out of the drainage holes. No sunshine please, just a nice bright windowsill.
