Everything you listed is classic ADD. I'm sure if we talked for an hour we would come up with another 20 items to add to the list.

Ask you GP for a reference to a Psychiatrist who specializes in ADD/ADHD.
I don't remember if I read how old you are, but don't procrastinate on this one, because if you have ADD the is a 90% chance that meds with help you a lot. Meds changed my life after my diagnosis. I'm hacked off that I did not find out about ADD earlier in life, but you just have to move forword.

I'm not a doctor, just a programmer, but I talk to a doctor about your symptoms. Feel free to pm me if you like...