Welcome to HCM
We understand your concerns
I read your problem description. I would like to assure you that your hamstring injury
and other symptoms you are mentioning are not worth worrying and might have nothing to do with weak erection.
You must have become bit weak due to those symptoms physically and mentally. To regain physical strength, avoid becoming worried and eat healthy and nutritious food. mental strength comes automatically if you are physically active. Do consult a psychologist
if need arises.
Hope this clears your doubts. Available for further clarifications.