Migraine with hallucinations

I am female age 66. I have had migraines since I was 24, always with aura. For many years I was offered pain medication for them and finally imitrex but it didn't work for me. Nearly 3 years ago I moved to a new city and began seeing a new doctor who suggested a medication to prevent them. It is topamax. Shortly after taking it daily my headaches ceased but hallucinations began nightly. I still have them every night although they have evolved. They were just still pictures in the beginning but now have motion and always are before bedtime when I am tired. At first they frightened me but are like old friends now. Occasionally they change in one or two aspects and cause no harm. I think they are related to the topamax more than the migraine but am not certain. I would like to know if anyone else has similar experience.