Should I be worried? I was away for 3 days and this thing grew in the soil of my Monstera. Google told me it’s a Shaggy Inc Cap Mushroom, but I’m unsure. How would that get in there? I repotted the Monstera back in March with fresh soil from the hardware store.
These things grow all over the place, including right in the lawn, when the conditions are right - shade and moisture mostly. Make sure you’re not over-watering your plant and that it’s in the sun the right amount and you’ll be fine.