hey there, youhave two questions so I will answer the first one first : you have the start of magnesium deficiency, you can tell by the yellowing between the veins of the leafs. Second question, I'm sorry man, but you have a male plant coming on, see those ball sacks. They wont open right away but they can get damaged and still pollinate your whole room. bag them with a large black trash bag and remove them from the tent as carefully as possible to avoid pollination. Hope this helps ! 🚀