My molly has been steadily getting fatter, at first I thought she was pregnant however no fry have been born. So she's been happy, feeding well, no issues with behaviour, and steadily getting fatter for around 2 months. Yesterday she didn't want to feed and I noticed she would rest on surfaces or in plants and stop swimming. Her bum area looked swollen. During the evening I would find her just laying amongst the plants (never on her side or upside down) and honestly thought she would die overnight. I found her lying still and head down within the plants this morning, but when I got the net to retrieve her she began to move and is now hanging around the top of the tank. She now has something protruding from her bum. Despite googling furiously for 24 hours I still have no idea what's wrong or how to help her. Can anyone please help?