Everybody's a little ADHD, and everybody's a little crazy. You have to reach a particular threshold before you qualify as "clinical."
If you are able to function independently, then you probably won't be clinically diagnosed even if you have some struggles here and there.
Consider the difference between a person with OCD who feels really uncomfortable when they aren't able to perform their compulsions vs. a person who suffers a complete mental breakdown and loses all ability to self-regulate for hours or days.