prevention meds

Okay, I'm beginning to think there is no medicine going to help with prevention. Besides, everything I try has side effects so bad, that it's like, I tried migraines for abdominal pain, and dizziness and not sleeping right. I just feel frustrated. Still hoping my new doc can help. he put me on Seroquel, and I didn't realize "nasal congestion" was a side-affect. Well, after 3 days, and nights, not breathing out my nose and taking zyrtec, and nasal spray,....I saw that was a side affect, and then my stomach was so bad, I was doubled over. Any ideas for prevention that has worked for anyone?