I was feeling fine Saturday and had sex that night. Woke up fine Sunday morning, by lunch my left testicle was aching like a toothache. It hurt to walk. Had sex angain Sunday night, woke p fine Monday morning and by 9:00AM was aching again. Would could this be? I am a 33 yr male, 5'10" tall, 18lbs., and only problem i have is hypothyroid.