I just started my tiny garden. I got married in March and decided to create something of my own on our little apartment patio. Everything was going perfect and then... today when I woke up I went to go look and there are white fuzzies growing on top of the soil. It's only on 3 of my plants, and it just so happens to be the 3 that I either just repotted or added more soil too. I'm worried it's some type of mold and that that the new soil caused it. ill post pictures. any advice or help as to what it is or whats going on???

The white stuff is perlite or possibly styrofoam beads and it is added to potting mixes instead of sand to improve soil porosity and drainage. It is a good thing. Repotting your plants unnecessarily is not a good thing. Most potted plants grow best when kept moderately potbound.

If you look closely, you can see something that looks like a fungal growth. I think it is just an indication of wet soil breaking down. Make sure you aren't over watering and there is proper drainage in the pot.