fish pregnancy

She wasnt this big a few days ago and she kinda just bloated like this over night, I have 3 other Panda mollies and as far as I can tell I have 2 males and 2 females. She's not dying, is she?

Hey all, fairly new to indoor fish keeping, I have a oranda that me and my partner think may potentially be pregnant, but tonight shes started to lose her boyance in her swim bladder control and is floating to the top, and some time upside down, any help or advice would be greatly appreciated...