What could be happening to my nails?

Yeah it's most likely because you wear so much nail polish. To fix this, just lay off the nail polish for a while until you notice your nails getting healthier. It's also good to use a 3 or 4-way buffer on your nails. It'll get rid of the ridges and extra color and it will also smooth them out. Also, don't use 100% pure acetone nail polish remover to remove your nail polish very often because that could cause damage also.