ADD vs. Anxiety

my head is always crammed full with the beginnings of ideas and i feel overwhelmed by my thoughts. I can't concentrate because I can't pick one idea. Each time I try and start one thing my mind whirls and all I can think is "was this the right choice? do i really want to be doing this over the other ideas i have? what if i should have picked something else"
At first I was diagnosed with Adult ADD and it made sense, I can't concentrate. 
Thinking back to HS I might have had a mild degree of ADD/ADHD was outgoing, impulsive, and loud but I got good grades, wasn't disruptive and excelled in sports.
I concentrate the best while doing something else (example: i made it through college by constantly eating while typing papers) Its like i need a monotonous or background activity to complete other things. Working out was like that too I needed TV, music, magazine and sometimes that wasn't enough.
ADD medication (Straterra, Adderall, Dexedrine) did nothing for me in terms of concentration. I felt jittery and over caffeinated. In college people had told me how great it is to have meds like those and how I would be able to study and concentrate for hours. That was definitely not the case. (on a related ADD med note my appetite in NO WAY decreased)


A few years ago I started thinking even though I fit most of the criteria for ADD, maybe thats not it. I have always been anxious and slightly paranoid (mostly out of insecurity - straining to hear if I was being talked about in HS, worrying if we partnered up in class if I would be sitting there alone forced to work with someone else that also didn't have a friend in the class that didn't like someone else better)
When I get alot of work to do, I immediately feel overwhelmed and get this rush of adrenaline. My thoughts race and I want to get everything done NOW. right now. I have trouble thinking about where to start and how to prioritize. Luckily its manageable where I can calm myself down and get my work done.
Anxiety meds (Xanax, Ativan) do work quickly but they also leave me feeling tired and slow for the rest of the day after the anxiety has passed.
I have social anxiety - I never leave the house without carefully selecting everything I wear (even if its just workout pants and a hoodie) If I am out and don't feel I look the way that I want to then I feel this constant anxious adrenaline filled energy gripping my head and chest.


ADD, Anxiety, insecurity? I hope by paying attention to my reactions and writing them down I can help myself understand