Hi Richard,
I'm sorry for what you've been experiencing with your cat, it sounds very frustrating and must be very uncomfortable for her. Is she losing weight? Given that her condition is worsening, I would definitely be bringing her in for further evaluation and testing. When general practice veterinarians aren't able to determine an underlying cause for a problem, we either do further testing/evaluation or refer pets to specialist. An internal medicine specialist would be most appropriate for your cat. You can ask your vet for a referral or find one here:
https://www.vetspecialists.com/ It sounds like your cat could be regurgitating and not vomiting, if you're not seeing the abdominal contractions/retching before it happens. However, the coughing may be a form of retching. This is an important distinction for your vet - here's an article about
vomiting vs. regurgitation.
Good luck and please let us know how she is doing!
Sheila
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Sheila Segurson, DVM
Diplomate, American College of Veterinary Behaviorists
Director of Outreach and Research
Maddie's Fund
9258608284
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