mold problem Please help save my plants!.....(PICS)

ok so i came home from work a few days ago and i noticed theat there was some kind of orangish yellowish mold starting to develope on the soil and i didn't pay to much attention to this but now its been a few days and it is definetly spreading. my plants are only 10 days old and i put a fan in my grow room after i saw the mold i probably should've had one in there since the beginning but its to late now so if anyone knows a way to get rid of the mold and prevent it from coming back it would be greatly appreciated.

alright thanks man i'll do that

I have a white powder on my buds and leef. I had little nats flying around and bugs in the soil. I think I am skrewed. How did the scraping off the top soil and replacing it work for your mold problem. I would love to know.

Might be fungus, like this https://www.rollitup.org/marijuana-plant-problems/371309-creepy-yellow-fungus-pics.html

If it is a fungus/mushroom it might be best just to start over. which is what i ended up doing after wasting a lot of time trying to salvage.