Had the same thing in the Midwest about 8 months ago. Had to call a half dozen offices before one would take me and appointments had to be scheduled long in advance. I had not been to the doctor as an adult either and was quickly surprised by how frustrating healthcare is.
This is new since Covid era. You used to be able to get an appointment for a physical just a few weeks out, and it was easy to find a new doctor if you needed to.
It regionally-dependent though. On average, if we need to see a doctor, we can get an appointment in a day or two. For a routine physical, it might be two weeks, three at most.
This has been developing for a very long time. The two major medical school systems, MDs and DOs have kept supply of medical school graduates below the demand. This has kept the market rate for fees up but has created market inefficiencies. There is an under supply of general practice doctors. And it will be hard to reverse as the internships and residencies are usually in hospitals and large medical centers and there is little room to expand the incoming DR supply.
Same, had to call around a lot to find primary care, and was being given multi-month waitlist estimates for seeing an ENT specialist. I've had more luck recently as I was able to get into see an ENT in less than 30 days. It's also crazy how much everyone tries to upsell you. It' hard to tell what tests or procedures I really need.