[bettababy]

Get some test results posted asap, along with the other information that was asked for. We can't do anything to help without that information. In the mean time, let me say that comets are not compatible with mollys, guppys, etc etc. simply because comets are cold water fish and the others are tropicals (warm water fish).
The more information you can give us the faster and better we can help you.

 

[bettababy]

Comets top out at 14 inches, are one of the dirtiest fish there are, and grow extremely fast. I'd get rid of them unless you can afford the 75 - 90 gallon tank that was suggested.
As for the other fish, they're probably suffering most from the cycling, so the sooner you can get test results here, the better for all.
What kind of filter are you running? Is there carbon in it? How much and how often are you feeding the fish? What kind of decorations and how many are in the tank?
You have maximum fish load in your new tank, and this is never an "easy fix". It's going to take time, effort, and a lot of patience to get through it. Don't give up, though... if you're willing to do the right thing, it IS fixable.