I have looked up and down for a solid list of side effects of this drug and have been unsuccessful in finding one. Several articles did say that headaches are a common side effect. I did not find anything about dizziness.
Unfortunately, this drug is still new so there is not as much information about side effects as with other drugs. My best advise is to continue following up with your doctor. If you are really suspicious you may need to stop the medicine for a while if possible to see if your headaches/dizziness get better.