Ah! So sorry everyone is telling you that everyone has ADD. Pretty common mindset these days it seems - but there is a difference between coffee high, stress, and ADD. Glad you finally got some clarity with a diagnosis.

I was recently tested for ADD by my pdoc because of similar situations described by you that arose somewhat suddenly, reason being to rule out the possibility that maybe I just hadn't noticed either. ...But I don't have it! (Not even close, actually.) Just anxiety and such, everything I've known I had, just with new/varied symptoms. So, again it's good that you got tested for an official, solid diagnosis. I think, maybe, to alter the common response is "everyone THINKS they have ADD."

It's surely possible that stress etc. is an unrelated matter, but it's good to examine whether struggling with whatever it is one struggles with on the side (in this case, ADD) isn't sort of...giving easy rise to its beginnings. Again, in my case, I feel stressed often but realize now that this is because of my struggles with anxiety and all the rest. So, it's good to maintain a good relationship with your doctor or therapist so they can help you determine what is going on in your own personal process and to help you nail down the sources of separate issues/symptoms.