It is human to have bad days, but just not having motivation every now and then isn't a.d.d. Other than that symptom there are other core a.d.d. traits you would have on top of this. You can google for tests online similiar to the ones a Dr. would give you to see where you stand. I highly suggest taking it with another person who knows you well, so your answers are not bias. When I took them by myself I had a tendency to give my self the benefit of the doubt and it affected my score, but when I took it with my girlfriend at the time or a family member, the difference in the scores was huge.
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I am a person with a job not many would do,
yet I'm a person just like you. I don't want your pity just your respect with understanding of the thoughts I collect. I'm constantly put down for the job that I do, But if I didn't do it, I wonder would you?