There is a drug called Betahistine which supposedly increases blood flow within the inner ear. It's been available for many years and some patients reckon it improves their tinnitus. However, the professional surgeons I have spoken with do not believe it works - period. They attribute people reporting improvements due to the placebo effect being notoriously strong in tinnitus cases. If the drug did work, why isn't it promoted as a miracle cure?
Get a pro opinion, Pud - and get a current audiogram. In all honesty, I suspect that amelioration is unlikely to come from drugs - would you say it's a coincidence that the tinnitus has emerged during / after a stressful period?