Hi Gail, that happens with some of my posts too, very annoying. I'm not a vet or anything, but what you said seems like what was going on with my mum's cat. The cat had a cough and she too was old and frail, my mum took her to the vet's and they give her antibiotics for the cough and had a good feel for lumps, vet couldn't find anything wrong. A couple of months later the cough returned, so back to the vet's. The vet found a lump on her kidney and it was a tumor. I'm not suggesting this is what's wrong with your cat, just better to try and treat it sooner if it is.
I also think that if vet's know something is wrong they try to delay the heartache for us.