If you trust that your are competant in sexing your plants and you believe that you may have a hermie, get rid of it, fast! Carefully remove them, don't shake or bump them around too much. Avoid all contact with female plants.
the best lessons are gained through experience. that's why us old guys have always got the best shit. Watch your plants closely, and make adjustments as needed.
If nothing else, at least go to a garden supply center to get a proper fertilizer. 20-20-20 for veg. 0-50-0 for flower. your yields will be worth the extra trip.
When in dought, vent. Heat is your enemy in a grow room, whether it is near your plants or your equipment. Only with CO2 infusion would you need to conisder limiting the air flow through your grow room.