I'm 24 yrs and i went to a hospital worried about lung cancer my blood analysis and xray came healthy should i worried i use to smoke meth and weed?

Watch for changes: In general, for the short number of years you would have smoked, you should be okay. Lung cancer risk is a lot about genetics and other factors, not just smoking. Congratulations on not smoking any longer. Just keep track of any new breathing symptoms. Also a change in cough or unexplained weight loss should be looked into.