About: my GP, not hospital
I'd been not forgetful, but simply quite unable to recall fairly recent events. Worried, I went to the GP who suggested checking, among other things, my B12 level and another element which allows the body to use the B12.
The result was my B12 was around 20% of normal and I had a course of 12 injections of B12 over the next 5 weeks. I now feel so much more myself, not worried that I am unable to carry out my work, and be the subject of colleagues thinking I am past it. Highly impressed with my GP.