She handed me the stethoscope and my mind went blank: It was all downhill from there

Let me set the scene, because only then is there a smidgen of hope that I can retain any credibility as a medico.
My husband and I were in the outpatient department of the hospital where his haematologist was reviewing his results following completion of his first cycle of chemotherapy for multiple myeloma.
One of the results, which could have provided evidence of the efficacy of treatment, was still pending.
Other results showed possible collateral body damage.