I'm a migraine sufferer before I got pregnant and it gets worse during pregnancy, your OB should be able to prescribe you something alone the lines of Fioricet (a pregnancy mirgrain med) mine has me take it if a dose of regulate Tylenol doesn't knock it out. Works like a charm!
Also try and find your 'triggers' I kept a journal of what o ate and did for a few weeks and saw certain things caused my headaches/migraines to happen more frequently.
Hope you find a cure soon