yeah, i wont do home remedies anymore. for that very reason,and i had it worse than you. sm90 will slow them down as well as increase nute uptake. cost appr.$10-20. other than that with gnats its humidity and soil moisture that keeps them going. they start as larvae in the soil. they like moist soil. then they emerge as the gnats you see "buzzin in your face and stuff". had em for 6 years and then poof, gone. damage can occur from larvae eating roots...let soil dry appropriately and water as needed. you should be alright. dont cut right now. a lot of times it will work itself out or cloning may cure you.