Thank for asking to HCM
I appreciate your concern, you have described hare different condition that are not related with other like the radiated pain of upper arm goes down to fingers and the lump under the arm pit, the pain could be due to the nerve
compression and lump could be a lymph
nod of nonspecific reason, the problems could be managed well symptomatically, some how this type of clinical conditions always associated with the functional elements, you need to keep your self away from the anxiety
hope this information helps you have nice day.