I sent a pm but its not showing in my sent folder.
and I would wonder if the Betta is decided on or not. Having a betta in there may limit other fish you can keep as they become tasty (and expensive) snacks.
You might get more respect if you post and offer advice based on personal experience rather than something you read on a forum on the internet. Was it
Images are not clear so cannot say definitely.
There are both the possibilities either she is pregnant or swallowed a marble that make her look