My gerbil has gained weight

[doireallyneedaname]

So recently my gerbil Smokey has gained alot of weight going upto 107g I started to worry so I purchased her and quartz a bigger cage. I also let her run around a bit. But today I took smokey out and she bit me. So I put her into her carry case. Her stomach looks like a small ball and the bottom of her stomach is a browny orange colour and the fur is slowly disappearing. My dad said maybe the vet misgendered quartz and she could be prego and not to worry. But I am. What should I do.

[LilyandDaisy]

Hello,

Just a few questions to help narrow things down:
- How old is Smokey?
- How long have you had her?
- What did she weigh before?
- When you say the bottom of her stomach is browny orange, is that on her front? What colour is she normally?
- When you say her stomach is like a small ball, does that mean she is bloated or has swelling?
- Where is the fur disappearing from?

Sorry for all the questions but hopefully with a bit more information someone will be able to help you and Smokey.