I'm diagnosed with both, so I'm assuming it's possible. I was first diagnosed with bipolar I and just this last year finally got diagnosed with ADHD. It could be a number of things, maybe the doctor did diagnose you wrong, or the meds your on aren't working. Either way, I'd suggest talking to your doctor about it and work with him/her to find the right combination. It took me 2-3 years to finally find the right combination to control my bipolar, so it is a lot of guess and see work when coming up with the right combination. The icing on the cake was the concerta for my ADHD. Now you wouldn't even know I have either. I'm a total different person then I was just a few years ago. I wish you the best and I'd start with talking to your doctor about your concerns.