Help!

[Grengar]

Hello! I recently acquired a baby carpet Python, it was a the runt of the litter but appeared to be healthy and is eating well. I've had her about a week and I've noticed the whole back half of her body seems Bloated and floppy while her front half seems to be getting thinner. There is also a reddish undertone all over the back half of her body and she feels kind of mushy. I've looked all over the Internet and can't find any symptoms to match these, please help!