For the purposes of awarding benefits, the Social Security Administration (SSA) has its own definition of “disability,” which could differ from your doctor’s.
Social Security’s definition is strict compared to many medical professionals.
It’s also possible your doctor hasn’t described your condition correctly to Social Security, and you in fact do qualify under the SSA’s rules.
Doctors sometimes rush their reports, don’t know all the factors relevant to the SSA or don’t explain your case in a way the SSA claims examiner recognizes as a disability.
Also, you could’ve left out some important information that would help you. For example, it’s important not to downplay the physical and mental demands of your previous job, leading the SSA to conclude your work wasn’t as demanding as it was.