I am so sorry oldguy. This sounds like typical office crap. I wish you would have not even called them. They probably were there way after they said. I get tired of the one sided way we get treated. We cannot be late but we are never seen exactly when our appointment is....in fact sometimes far from it.
If you like that doctor you were seeing I would call back or go there and explain your worries in person. Maybe that would help them to better understand your troubles.
Do you have family close that can give you some moral support? Please discuss your worries with someone that can help you. You have too much to endure alone.
Some body once said to me, "so this is the golden years"? LOL!!! That was my mum.....she was right!!