Hi, Thanks for posting in HCM. I understand your concern. Experiencing back pain and lower abdominal pain looks more like originating from kidneys and could be due to presence of kidney stones. You need to get abdominal ultrasound scan done and consult Urologist for further assistance. For premature ejaculation, you can practice pause and squeeze technique as part of behavioural therapy, which would benefit over a period of time. Hope the information provided would be helpful. All the best.