Is transplanting them have to be done? If they're in containers that are big enough, I wouldn't bother transplanting, but if they need to go into a bigger container, that do so.

Transplanting is not hard, very easy. First, let the soil dry out completly before moving, it makes it easier on the plants if the soil is a nice, dry clump. Take a butter knife, and go around and gently loosen the soil from the sides of the container...I find the dirt clump comes out easier doing this Then VERY gently, lift on the plants stem, and slowly pull the dirt clump out, roots and all. It's okay to lose some dirt, but the less, the better.

Now once you have the dirt clump out, fill the new pot with new dirt, and fill it up as much as you need to to. Get as close to the bottom of the plant you can with dirt. Fill the remainder of the container up with dirt, gently pack it down and water...lightly water.

A lot of newbs make mistake by overwatering in their new pots. You have to allow time for the roots to expand in their new homes.

Allow your plant at least a week to recover from the move. If you do it perfectly though, with no losing of the dirt clump, then the plant should suffer 0 stress. While your plant is recovering though, it will grow very little, so you don't have to worry about it getting too much bigger in that time.

If you're going to transplant, you have to allow it time to recover. If you put it through 2 changes in a short time frame, you could risk getting more males than females. When growing from seed, I find the best way to get female4s, is to put the plant through as little stress as possible, and if you do, allow it proper time to recover.

About the drooping of the leaves. Sounds like you are overwatering. Only water when the soil is dry. Dip your finger about an inch deep into the soil, if it is moist underneath the top soil, don't water. Wait until it's dry. This way the roots search for water, expanding their root system.