Your Mother is worried you may overdose. You need to have the doctor reasure her that you have permission to take meds as you do.
Remember there is hope. I had migrains for 20 years. I never saw my medical records. My doctor was recording extreme high blood pressure and chalking it up to "White Coat syndrome".
I also had an irregular heartbeat. When that was taken care of with medication, my headaches stopped. You need to have tests run, I did have tests, but Doctor thought it was stress or in my head. The high blood pressure medication Benicar also prevents migrains. Of course this is only for people with high blood pressure, taking it when you have normal blood pressure would be useless and even dangerous. Hope this helps.