Can Multiple Orgasms Give You Migraines?

Dear Dr. Betty,
I have a question about the Hitachi, multiple orgasms and side effects. My girlfriend and I are both 51 and have a great sex life. She loves sex but would like to have more orgasms. Until last weekend, she had never had a multiple orgasm. As a little background, we rarely use sex toys and she orgasms about 75% of the time, almost always from clitoral stimulation after intercourse, either from my tongue or my finger.