molly help please desperate fish advise

Okay so my not so pregnant molly gave birth to prematured fry, I'm sure all are dead and she was still giving birth a few mins ago now she stopped. Now there's another pregnant molly in the tank and the water is a little dirty so I just changed a bit and put little warm water, now there's...

IM NOT KIDDING! THIS IS NOT A JOKE! IM ABOUT TO CRY I DON'T KNOW WHAT TO DO IVE TRIED EVERYTHING! My molly fish is very very sick I believe. She is 3 times a normal molly fish! Her stomach is huge and no she is not pregnant, I dont over feed, I do water changes I have other molly fish that are...