Suggest Treatment For Migraines Despite Taking Imitrex

Hello, Thanks in advance for information. I experience frequent migraines. The only medication that seems to help is Imitrex. Unfortunately my insurance only covers 9 tabs a month . That does not seem to hold me the entire month. My family Dr. Of 25 years just retired, my current Dr. Does not seem to be much of a patient advocate. ANYWAYS, that s unneeded info probably.. I did ask my current Dr. This question and acted as if he was uncomfortable and said he had never heard of this. So, my question is could very large (natural) breasts be causing some of my migraine issues. It seems worse with certain bras. Therefore it leads me to believe that it s possible the straps are maybe causing some sort of nerve compression causing migraines. I know it s a long shot. I have had an MRI that was completely normal. Thanks Cathy