Ah shame man! Cats are so lovable and the attachment to cats is so real. Impersonal people would say "just get another one" if it dies. Surely they don't have a clue. I stay away from pets at the moment because I know the commitment it takes. Until I am able to support an animal, I will stay clear. Makes me sick to know some people use pets for fighting and abuse.
On the point of your kitty fussing when he is at the doctor... My 3 year old son has had the same problem. He refuses medicine etc. It is very tricky. Good luck and I wish your kitty a full and speedy recovery.
Thank you