Baity,

Thanks much for your excellent suggestions and advices.
I tried best but could not find any source for Pentarken Cinnaberis and only option seems to order from Scwabe, Germany which will take many weeks to obtain.
However I took Hepar Sulphur 200 as you mentioned for six days. It has cleared most of my foul smell exhalation problems though some remain. Also, some of the swellings of sinuses and inside of my nose (turbinates) has reduced but not completely.
I strongly feel that if I get rid of all the ill effects caused by those remedies that I had taken for many years, I should be alright. (This I say because the specialist ENT who did endoscopic sinus examination, an year ago, did not find anything wrong except swellings of the turbinates, which was ofcourse due to the long use of the remedies)
Appreciate advice if I need to take any further remedy.