Dont cut the leaves. Your plant is dropping because of over-watering, and cutting the leaves is not the way to fix it. Look the words in red below, happy reading
Your fine there not pre-flower. those are on both male and female plants. I cant remember what they are called but when young they look like white hairs but their not they will turn green.
Can you post some new pics. Some potting soil has nutes in it and some dont, thats why they ask for the name of the potting soil like Foxfarm. pro mix, MG
I know it took some time to put all that foil in there, but thats most of the problem. foil will cause hot spots. do you have a air inlet in there? painting the walls white would be a lot better.
I have some of those trimmers. The problem was from running those lights off a extension cord, never a good idea. If you have to only use heavy duty power strips and extension cords.
It was on 3 leaves first leaf it was circular and in middle of leaf. 2nd was was on the edge of a small piece of the leaf. 3rd leaf i dont remember but it was small, i smoked since then LOL. What i dont understand is after placed in a zip-lock bag laying on a table for less than 1min nothing...