Sadly after that magic year 5, if you have been clean, then it can be difficult. Currently my husband is taking an oral chemo and about 5 support meds and cannot get in to see his oncologist even though he is having some fairly severe ankle and foot swelling, and some discoloration. They told him to see his PCP, who can see him the first week of July.
Are still taking treatments?

It is not only frightening it’s wrong. By the time I can get into to see another doctor in weeks before they can give a referral to an oncologist that might be able to see me in a couple or a few months... There’s nothing right reasonable or logical about it. The message is basically: Dint waste our time.
Ok, then change your practice to provide appointments by nurse practitioners and then a fast track to the oncologist.
There once was a time where people were treated with compassion concern and empathy. Doctors got involved. I’m lucky if any of my physicians remember me from appointment to appointment.