Is it possible to develop ADHD during my teens?

Reasons 4 distract'n. Many things in life r distracting. Not all of them r adhd. Anxiety, depression, family problems, trying to do more than is humanly possible, all can cause loss of focus. We are told we shd be able to "multitask, " but we can't. The term comes from computers, ; they can't without more than 1 processor. We only get 1 processor. Get an evaluation w/ a therapist who is not already convinced it's adhd.