I've always had to wait. Living in a city where things can happen in a minute, treatment, surgery doesn't always go that fast, and also depends on how busy the doctor or hospital is. Sometimes it's better to delay, for various reasons, since whatever is done can't be taken back. On the other hand, cancer can progress quickly in a short time, and was always anxious to start, not that I even wanted it. I vaguely remember hearing there was some sort of guideline for a max two month time wait to start cancer treatment by CMS (Medicare, Medicaid), which was changed to 30 days?
Good luck.