Phalaneopsis - leaves turning yellow fairly quick

[JAG01010]

Greetings all,

Newb here. I have a phalaneopsis I purchased from target to make my apartment look nice back in September. Last flower fell off a few months ago and I was about to throw it out but decided to keep it. I researched some and found out that a bulb that was growing is a keiki.

Very happy and decided to take care of the plant ( first time doing this but wanted to see if I have a green thumb) and all was well until a few days ago the leaves started to turn yellow, I noticed today that one of the stems is yellow at the top and the keiki is turning yellow also! Help!

I am not sure what's wrong, I don't think it's crown rot, water is fine... I am not sure. Help please I would like to save it!

Much appreciated from a guy with no idea what he's doing!