I think I have ADD/ADHD?

If your psychiatrist says it's okay, maybe you should try ADD meds. You have to understand though, that ADD/ADHD are very over-diagnosed conditions. Everyone has a few symptoms. However, it does sound like you've had a lifelong struggle. I think going to a psychiatrist will help you, he or she can prescribe you some medication for the ADD, which may also help with the depression.