Chronic nerve pain

I haven't used this subreddit before and don't know what kind of answers I'm gonna get, but I'm running out of options. I've had intermittent chronic pain for the past 3 years in a rather sensitive place (hint: it's my left testicle). I've been examined by something like 6 different doctors, and none of them can find out what's causing my pain. No it's not blue balls, I know what that feels like. It's only on the left one too. The doctors have all examined the area, even got an ultrasound, and it all looks fine physically. It hurts only when I'm sitting or laying down, anything that puts pressure on my butt for some reason (only the left side. even hurts right now as I'm laying in bed typing this). Some days it isn't that distracting of a pain, some days it's barely tolerable, and some days I teeter on the verge of complete insanity. It isn't a sharp pain, but more of a dull and aching pain. Still debilitating. I've tried everything to relieve the pain; yoga, hot/cold water soak, stretches, chiropractor, different underwear, and excessive amounts of Motrin. I can relieve it temporarily, but never for more than an hour. I want to find out how I could fix it, and I don't want to end up addicted to narcotic painkillers (I doubt my condition warrants a prescription anyway). My theory is that it's a damaged nerve that has never healed properly that's set off by me sitting down. I'm here in desperation, I need ideas, anything that could possibly fix my problem helps. I'll answer any clarifying questions that could help serve a diagnosis. Thanks