Hi! Good evening. I am Dr Shareef answering your query. Although it might need a physical examination to opine on this, it seems that you have stretched your abdominal musculature while lifting heavy article. Also if you were not careful in supporting the testes with properly fitting under garments, the testes might have got inflamed testis resulting in epididymo orchitis giving rise to such symptoms. As there was no bulge or swelling, a hernia could be excluded for the present pending a personal physical examination. Till the diagnosis was confirmed, I would advise you with some anti inflammatory drug along with a proton pump inhibitor for a symptomatic relief. I hope this information would help you in discussing with your family physician/treating doctor in further management of your problem. Please do not hesitate to ask in case of any further doubts. Thanks for choosing health care magic to clear doubts on your health problems. I wish you an early recovery. Dr Shareef.