It's going on day 3 of my migraine and my neurologist couldn't get me in. Any suggestions on what I should do?

If severe, go to ER. You should have medication to abort the migraine and ideally a "plan b" med for if the first fails. If you have exhausted your meds and/or if pain is severe or just won't give you relief, should go to er for medication--otherwise, better to avoid.