Throat infection on continuos occasions.

Sir, I am a banker I had a smoking history from 2008 to 2012 I left from then, recently I'm promoted and transferred to Eluru from Hyderabad. Since I joined there I am continuously getting throat infections. Last year too I had throat infection but when used monticope a and cepodem az that got cured. But a two months back I was at Hyd and when I returned back to Eluru there was drain block at my apartment, to clean that I used Bleaching powder, which had lot of effect since then I am facing throat infection and and sometimes chest pain. I went to an ENT doctor at Eluru he said there is no effect of smoking for sure it's due to water effect and your sensitivity towards refrigerated items. I am feeling ok but my question is , Will there be any effect of smoking even after I left it 5 years back and dat I was not a chain smoker???