A couple of thing I didn’t notice in the above suggestions.
1. The net and this site are good sources of information. But, you might see about a book such as “Delivered from Distraction” Learning about ADHD and recognizing what symptoms and behaviors you have will help you to develop skills for dealing with your particular set of problems. Now that I am able to recognize some of my ADHD behaviors I can begin to deal with them.
2. You could call your GP’s office and ask if they have any information you could have about ADHD. This would give you a good lead in to discussing your problem (mom and all) with a receptionist, nurse, or perhaps even the GP to find out what your options are. They may even offer to talk with your mom. If they are any good, they will want to help. (If you have friends with ADHD, you might ask which doctor they use. Not all doctors are knowledgable with regards to ADHD.)
3. Russel Barkley in one of his videos talks about the dangers of ADHD and driving. You may be able to leverage your position using this safety issue, since you are, or will soon be, driving.
4. You can lay the old “you don’t want me to suffer the same setbacks and difficulties you had growing up” guilt trip on dear old mom. Followed by the “you want me to suffer!” guilt trip. (Last resort)
5. (Omitted as it is a worse idea than #4.)REPORT ABUSE