[anonymous]

I would not give over the counter meds, supplements (especially those not intended for veterinary use) or make diet changes (your pet is on a prescription diet) unless instructed to do so by a veterinarian that has examined the dog. For example, antacids are known to interfere with the absorption of other meds.
Please try to refrain from self-diagnosis. It’s a dangerous game and you could make things a lot worse. Work with a veterinarian. There are no veterinarians affiliated with DFA.
Didn’t your vet give you a treatment plan? I would go by that alone. Nothing else!

PS: I am becoming concerned. Please listen to your vet! Like she said, if you want an exact diagnosis have the testing done, everything else is just guesswork.
I suggested you make a video to show the vet, not for you to try to self-diagnose.
Best of luck.