AnaHannah, the first med I took to help with ADHD symptoms was wellbutrin, which is not a stimulant (I still take Wellbutrin plus a stimulant). I know other people who have taken Strattera, also not a stimulant. These may not help as many people with ADHD as the stimulant meds do, but they do help some people. So you could try one of those first and maybe get some benefit. They do not cause insomnia. I did not have insomnia before beginning on my stimulants, but I was not a good sleeper. I could not sleep for too many hours at one time so was always tired in the day. The stimulant, paradoxically, has helped me sleep more at night. But it can cause insomnia, especially if I take it too late in the day.

It seems like you are saying you are underweight? Can you work on that and get up to the weight you want? That might open up more meds options for you. Similarly, the anxiety.

Good luck.