Nortriptyline, Periactin, And Amitriptyline For Migrains?

My girlfriend gets really bad migraines for days on end. Currently, she has been taking the above three medications for a little over a year now to treat the headaches, but they aren't working, and her specialist tells her family that they will work. There is no other professional opinion at play here. Are these commonly used together to treat migraines, because two are for depression and one to treat symptoms of a cold? Should she see someone else about her migraines?