Hello Mike
I recognise many of the side effects you describe, a bit light headed if i get up too quickly, irregular heart beat occasionally and chronic fatigue as well as skin problems which I think may be fungal infection. All of these are post stem cell transplant and probably part of the baggage which comes with Myeloma. Nothing too problematic but I think the secret is trying to stay as fit and healthy as you can – this long spell of wet and windy weather we are having in the North isn’t helpful though.
David S