I've had a swollen line going down the middle of my penis for a few months now and during that period i've been to my doctor numerous times and he has assured me that there are no lumps in my testicles especially my left one where something wrong can be seen. Sometimes its smaller than the other and I only get a small pain like someone's been tugging on it and I only get it in the left testicle but most days my testicles are a reddish pink.

Im not sexually active (still a virgin) and my doctor has assured me on all occasions where i've been to seen him that nothing is seriously wrong but this is driving me mad.

Can anyone tell me whats wrong?