Mushrooms growing in my Rose, Help!

[druidessemily]

My husband bought me a small rose plant about 8 months ago, and it's been doing great until recently. Dozens of yellow mushrooms have begun to grow in the pot, both at the top, and downwards through the drainage holes. My rose looks like it is dying.

Someone suggested mixing baking soda and water, and that worked temporarily, but now the mushrooms are back.

I don't really want to throw out the rose plant, but it's looking like the only option... Before I do, does anyone have any suggestions?

[druidessemily]

Here is a picture of the rose plant. It looks so sad!