how far into flower are you?

Late in the cycle cannabis plant tend to do the following: Swell up with water, get real heavy, possibly fall over depending on the thickness of your stalk, and finally brown and shed fan leaves. It sounds like your at least 5 to 6 weeks into flowering and if that's the case your doing just fine. Prop up the kolas as best you can as they will only get heavier and fall over more! Stop feeding your plants, just use water at this point. Water them less then your normally doing if they aren't taking in any more water. You dont want mold issues at this stage.

The bottom line here is that the plants are done growing. They are dieing. You want them to die or at least think they are dieing as this will be the "kick in the pants" your females need to produce resin. The plants are panicking at this point and seek to do anything they can to attract pollen. Resin production will help them attract pollen or so they think. All it will really do is help you to get more high.

Your doing fine, champ