Hi Customer (name blocked for privacy),
My answer is simple in that it was based more on you wanting help with the pain he was experiencing yesterday. This was more of a remedy to try and help the pain subside sooner. Also you may want to start using these remedies when he first begins to show signs of distress.
I wouldn't substitute the above for finding out what is going on with him. I would schedule the appointment ask the vet for some dietary solutions to use in the meantime while waiting for answers. Tell him your dog is suffering and you need things that you can do to keep him comfortable.
It is a wise idea to look more into his condition and find out what is going on. Your vet should be more than willing to give you an up front quote on this procedure and also an explanation of what to expect and what this procedure is going to do for you and your dog.
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Peace and happiness to you and your pet! ~ Christina
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