I need help with mushy, moldy stem!

[LMNohP]

Hello everyone!

I have been in possession of my phal for almost three years. It has done wonderfully and produces beautiful purple flowers. A few days ago I noticed the bottom leaf was turning yellow. I figured it was no big deal. Today I noticed the whole leaf was yellow. I brushed my hand across it and the leaf broke off. Upon further inspection, the spot on the leaf where it was attached is black and mushy. The stem of the orchid is also mushy and black with some mold. I looked even closer and there are, what I assume to be, tiny red eggs and a couple of tiny white insects. What do I do? My orchid was an anniversary present from my husband so I don't want to lose it!

TIA!

P.S. I tried to add pictures but it said I am denied. So... How do I fix that?