doctors having to service too many patients

This a million times over. A couple years ago, I was in ICU on the brink of death and it's been a slow and arduous journey getting myself back to health. Part of that is me wanting to join a gym but my blood pressure has been high since my stint in the hospital. Two months ago the gym wrote to my doctor and asked for authorisation to let me work out. I got nothing back so went there twice over the past week to ask the doctor why they aren't taking it seriously. On the second trip, a receptionist said the doctor was busy, she had cancer patients and would get back to me eventually. Luckily someone else stepped in before I lost my rag at the unnecessary provocation. My doctor eventually phoned me in the evening with zero recollection of our last conversation, I can only assume she didn't read her own notes. She then wanted to send me to the hospital for an ECG and I'm like WTF, if I can do it on my watch, why can't the surgery do it. I would've happily gone to the hospital two months ago, but where they dragged their heels or I slipped through the cracks, it's not on me, it's on them to take responsibility for my health. All these doctors take on more patients than they can handle because each patient gets them a couple grand a week, but they don't do the things that should earn that money like being the general manager for your healthcare or following anything up.