Several symptoms/problems, likely all different; I doubt a single cause. The white bumps in the shaving area almost certainly were folliculitis, not herpes. Discoloration externally involving the pubic hair definitely has nothing to do with V8 juice (which in turn probably has no benefit against hangovers, but that's another story) or anything else you eat; as you suggest, it probably is a fungal infection.
Discolored semen, especially yellowish, tan, or brown, can mean infection, such as prostate gland infection. In theory it could be an STD, especially gonorrhea or chlamydia, but those are very unlikely to persist for a year, and would also cause abnormal discharge from the penis and/or painful urination. Yeast infection wouldn't cause this. Sugar intake probably is unrelated. However, diabetics are at increased risk for all kinds of infection, so you might check this out if you are at risk for diabetes (family history, overweight, etc).
If intermittent and darker (brown or visibly bloody), the most common cause is blood in the semen. Hematospermia--the medical term--occurs from time to time in many men, usually spontaneously and sometimes after trauma to the perineum (the area between the scrotum and anus), such as following a bike ride, off-road cycling, horseback riding, etc.
Bottom line: I would see a general physician; or if you like, a urologist. I doubt anything serious will be found, but the infection idea should be checked out.
Good luck-- HHH, MD