Hello, 2 months ago I was masturbating and while doing it ,I stopped and twisted  to right side and felt a sudden  painful stretch in the left  inguinal region and felt a little pain in that region throughout the week but it was sudden and would go away on its own . After a week I consulted a doctor and took ultrasound of abdomen but the results were normal ,urine and blood test also normal and no hernia was detected. But , since 2 month I still feel constant dull pain in inguinal region and flank left region  .I feel no pain in testicle or penis while urination or ejaculation. I feel weakness in lower  left abdomen region when strongly inhaling air upto chest and can't feel my muscles there.