Surely the doctor who ordered the test can give some idea of what should be done (if anything).

I also get annoyed that the test results show up in my “portal”, but I don’t know how to interpret the result. Then, have to wait for the follow-up appointment to have more clarification. It seems that if you have something out of the norm, a call from your doctor’s office would not be an unreasonable expectation. I imagine you are waiting for your follow-up appointment to find out the meaning of the result.
It’s a bad setup.