White mushroom in Phalenopsis mix

[MrsRegent]

Hi!
I'm new to orchids, I only have this one Phalenopsis. I'm not sure what kind, it was a gift. I remember it's a "just add ice" orchid and it flowers pink with white stripes.
I haven't changed the potting mix since I got it. It hasn't moved locations either. I used a little bit of liquid fertilizer on it a few months ago when it wasn't blooming. I made sure to use a fairly low rate, at least for regular plants.
Anyway I noticed this little mushroom this week. There's just the one. It's about 5mm across the cap. Is it a problem? Do I repot the orchid with fresh mix?
Thanks in advance!