I get check ups, it is nice to have. I know I feel dizzy, pressure on my chest and so on from time to time when I am in panic mode and they have no physical reason but I do not want to miss one, which is real. It seems like check ups are the best way to do that since having panic is like having a car with broken fuel, heat and oil indicator, which you can not trust
I am sure that your doctor is telling the truth. If you had a serious issue, which he overlooked then he will have a malpractice case, which will increase his insurance costs and damage his records. He will not take that risk just to make you happy since you have panic