COPD

Hi,quit smoking now,I am new here and need help. I was told at age 49 that I have COPD and it scares me now. I have no choice now but to quit and the part that scares me is if Ido not quit then I will be on oxygen in 10 years or worse. I can not deal with that thought and I feel like I wrecked my life. I need help or friends,Herbal cigarettes, I feel so alone and such a failure for not quiting when I "knew" all along that smoking was bad. My Dad died of cancer and in 2003 I lost a brother to cancer.So am I scared...oh yea now I am getting depressed worring about this COPD the doctor told me I have. I did quit for 8 days this last month but went back. Although I have only had about 4-5 smokes a day and some days less than that so am I doing better? Is that a sign I can quit? Jeff