I take 30mg XR and I have been taking it a year, I am 22. My sis...

I take 30mg XR and I have been taking it a year, I am 22. My sister and mother both have different forms of ADD, mine is the inattentive type without hyperactivity. I found that by taking adderall I was able to finally retain the information discussed in my classes to be able to put them back down on paper for a test, among other things. I used to have to try SO hard to learn and I could not ever quite grasp learning anything. With the medicine my grades improved drastically and with the same effort as before, I was able to gain knowledge and feel normal for once. I love the fact that I am now able to learn my new job and retain the information. I HATE that I get headaches in the afternoon lately and that my boyfriend finds me to be moody and too serious on the medicine. When I take a weekend off of Adderall I become a vegetable and my muscles are very weak. I also have trouble driving or getting anything done if I am awake because I feel like I am in a daze. I hate all of this, I would love to find a different medication that would help with my attention, but not cause these side effects. Any ideas?