HELP!! Not sure what to do!!

Not sure what to do I’ve found these growing from my plants they weren’t there 2 days ago when I watered. Is this a bad or good thing ? And what should I do.

Auto flower plants so I can to correct before it causes a problem if any! Thanks.

First guess would be a mushy compost you are using that has not been streralized. Pick em off and just stick to normal watering and feeding. Not going to lie, that is unusual, but more than likely you bought your compost from a small time operation with minimal qc?

I've had that on my current grow. It's actually a good sign in soil as it means that there is some life in it....as long as they don't take over. My mushies died inbetween waterings...

Yea I kinda vented and let the hot air from outside dry up the soil a bit and lowered my humidity it was at 56% and now it’s down to 36% but it got a lot hotter today and temps went to 88 so I put the Ac on to cool it down to 75