Need urgent help!

looks like magnesium deficiency to me. Could be wrong, but had similar issues myself

Typically, when cannabis transitions from vegetative growth to the flowering cycle, growth will slow as new hormones associated with flowering will trigger the plant to slow vegetative growth and make the switch to growing flowers instead. Over watering has played no part in this and the need to replant was probably unnecessary. None-the-less, being in fresh substrate will not be a bad thing, but remember to keep your/her substrate moist and not overly dry during early flowering, she will need good moisture levels while growing her flowers, but at the end of maturity, a slightly drier substrate is supposedly beneficial. Apparently this can trigger an increase in resin secretion and may also help prevent any moisture/humidity associated problems, such as mould. Hope this helps,..... Organoman.

If your plant was over watered 2 weeks ago and then also ended up basically being flushed of its nutrients and then also was repotted it will take a little bit to regain its vigor from all the stress and lack of nutrients. You dont want to shock it again Do not give extra nutrients as that may cause lockout. I would suggest that you water it as needed on your normal nutrient schedule. - Stick your finger in the soil that is approx 2 inches from the stem to your first knuckle and do not water until it is dry. Overwatering and repotting are quite a bit of stress all at once but she will recover. Great Luck & Happy Growing 🍃