Sounds like you may be seeing some little ones running around fairly soon.
Why do you think she might have the bloat? I would get her to a vet to make sure one way or the other. Bloat can be very dangerous for chinchillas ... it can kill.
If she is pregnant and is "huge", it could deliver sooner rather than later. Do you have a second cage for the male when/if she delivers a litter of kits? What type of cage do you have? Size and number of levels ...
Will she allow you to hold her? If the answer is "yes". Get comfortable in a chair, have someone hand her to you (have a treat ready that takes a long time to eat - maybe even a couple of them) Place your hand palm side up on your lap, place her on top of your hand with your fingertips towards her tail. Give her her treat/talk softly to her. Let her set there for awhile (usually 10 to 20 minutes) and see if you feel any movements in the palm of the hand you have under her. If you feel movement ... she is probably pregnant and will probably deliver within the next two weeks. If you feel no movements, that means one of two things (1) she is not pregnant or (2) If she is pregnant, it will probably be more than two weeks before she delivers. I would repeat this daily, until you feel a movement ... the first time you feel a movement of a kit inside her ... it will probably be about two weeks before she delivers ... be prepaired! If you feel movement the very first time you try this ... she could deliver any day now.
WARNING: Do NOT poke around her tummy, if she is pregnant, you could kill the kits.I have one pair that were together 7 years before they had their first litter ... it was a single kit. They have not had any kits since and have been together over 10 years. Never say never ... these little critters can fool you!
Jo Ann