My question is, in July of 2018 I was diagnosed with stage 4 emphysema, chronic bronchitis and severe asthma, I know there isn't an exact time from on how long it took to get to this point, but ssi may insist I prove I had it at least in December of 2017, do to my filing date for disability, to gain full benefit of the 45 plus years I paid in, only medical records I have start in 2015 from a heart attack , and 2017 showing spots on my lungs, any ideal of some time frame it takes to get into the stage of copd I'm in now