Hello, balanitis is a general term for inflammation of glans penis (round head of penis), there are many causes for this, in 20%of cases it caused by candida (fungal) infection, called as candidiasis. Present of candidiasis not necessarily implies presence of hiv,, both or different std's. Don't worry since you already got hiv test and it is negative, you can get test again after 6months (to avoid window period in hiv infection).