Start reading. Driven to Distraction is a great place to start. And even though I have trouble reading, i could read this because it was about me and the way I was living my life. Another book and I cant remember the exact title is "You mean I m not stupid dumb or lazy. That is a very good book.
After that call Psychaitrists in your area and find out if they specialize id ADD. If not, do go there. More and more the medical community is waking up to the fact the we as adults can have ADD/ADHD. Good news, you will become more organized, lists work great. Post on the fridge each morning and check them off as you do them. Schedule everything. and dont forget to read it!
Then begin checking out your creative side. I think you will be pleasantly suprised. I was. I knew something was there all my life and now had "permission" to explore.
Bad news, It seems to be hard wired. Just today I really mess up by saying something I shouldnt have and have been feeling way to guilty for it. Good luck your on the right track. Your life gets better from here.