How to stop persistent coughing?

My cataract surgery scheduled on 17 February maybe postponed. I am coughing so badly. I have taken cough syrups which I hated. It made me feel drowsy and lethargic. I have swallowed anti-biotics and other prescribed tablets but the cough still persisted.
I suffered from prolonged cough since I came back from Haj in 2009 which was at the height of H1N1 epidemic. My experience of having flu and cough there lingered in my mind. The virus spread so fast there because the pilgrims didn't bother to take care of themselves and thus spread the virus to others. Very few were willing to wear masks inspite of repeated appeals by doctors. Hygiene was taken so lightly. My room-mate refused to wear masks because she didn't feel comfortable wearing it. So, every time she has an attack, it infected me and I suffered. It took more than 2 months for the cough to subside after I came back. Blood screening proved me clear of any lung diseases. Since then I am quite susceptible to flu, cold and cough. And I am sick of it. I have tried almost every remedy that's recommended such as:
Air asam jawa and honey
Air limau nipis and honey
Air jintan putih and honey
Air rendaman nasi semalaman and selawat 3 times when drinking
Avoid cold water
Sapu dada dengan gel herba waktu malam.

All tak jalan! The cough is stuck to my throat like a leech.

I would like my cataract removed from both of my eyes. Driving is proving quite a hassle for me especially if I drive to unfamiliar places.
Last Sunday (13 Feb 2011) I kept my promise to Mila that I would come and meet her PRS of MRSM Kuala Kubu Baru. Ulu Yam is a place I have visited several years ago and have forgotten the way and so couldn't find the resort where her program was held. The road was unfamiliar and it was difficult for me for not being able to see and read the road signs clearly. Since it was Sunday, the trffic was quite light. I stopped at Ulu Yam Polis station and called Mila to pick me up from there. I made it on time.
Going back was difficult. Forgetting that unfamiliar road will cause some trouble driving, I chose to try the Batu Cave way. It was a mistake. Road signs and traffic worried me. Driving slowly irritated some drivers and I was horned and the more nervous I became. Eventually I stopped at a petrol station checking whether I was on the right track. The young man was patient enough to explain which road and exit I should take. Eventually I saw a Petaling Jaya road sign and with a sigh of relief followed it through to Federal Highway. I came home safely but promised myself not to drive to unfamiliar places until my sight is OK.
Anyway, thank you Mila and the PRS of MRSM Kuala Kubu Baru. I wish all of you success in achieving what you aspire.