Can pregnancy bring on complicated migraines in somebody with no migraine history? will they go away after pregnancy?

Yes x2.: The hormonal extremes of pregnancy can trigger migraines in someone without prior history and those should resolve after 6 weeks postpartum, as a general rule. Of course, any headache that has associated neurological deficit(s) has to be evaluated asap by a neurologist and/or mfm to exclude stroke, preeclampsia, pseudotumor cerebri, other severe pathologies. Tylenol (acetaminophen) (+/- codeine) and Reglan help!