Do i have a fungus problem? (Bad growth

It would be more helpful if you uploaded a recent pic: this looks like its of a 2 day old seedling. Looking at pics of the plant from your diary and description, it could be white powder mildew. There's no visible plant damage in the other pics. Once you kill the mold, the plant is young enough to recover and its still in veg (mold in flower is much worse). Step 1: Lower humidity below 50%. Normally that would be fine for week 3, but if you have mold, a little below 50% makes the environment more mold resistant: take any humidifiers in the tent out. Step 2: create a hydrogen peroxide solution. You can get the 3% at a drug store, just keep it out of your eyes. Mix 2 teaspoons per gallon and use it as a foliar spray to spray the leaves down and water as you normally would with it. Repeat if you need to. This is probably the most plant friendly approach as it won't harm your plant, though nothing can bring back dead leaves from mold growth, though when the plant heals, that old groth will eventually die before harvest anyway.

Third question in a row like this. honestly guys feeding cannabis crazy amounts of Organic nutrients is not a good idea.... Cannabis loves balance.