Going Down Fast

Not exactly sure where I went wrong, but all of my seedlings seem to be dying.  I have some serious fuzz/mold on most of the plants.  I think I may have taken them out of the vermiculite to soon.  The plants I left in the vermiculite are still growing like crazy and look really good. I think I may have watered too much.  I'm letting them dry out a little and see if they come back.  If not, I still have seeds left and will plant my lettuce/swiss chard in the actual garden and see if they grow.  The pepper plants seem to be doing ok and all my herbs are doing well.  Tomato, eggplant and lettuce are not.