Another start

I need to quit, but I have never really wanted to. I'm a 20 a day smoker for 35 years now. I have a 10 month old granddaughter, a wonderful son and a great life partner. My sister died of cancer - but she didn't smoke. Last week I was diagnosed with cancer but still I smoked all weekend long. Today I have a strep throat but still I puff. I've tried accupuncture, cold turkey, hypnotherapy, patches, gum, inhaler - all 1 by 1. So now the set date in in 4 days - so here goes again.