If it's a migraine, I would advise to wait a while to see if the nauseous feeling goes away or lessens. If it doesn't, and you feel like you are going to throw up but can't naturally (i.e. not forced) then maybe try to make yourself sick. I am stressing the maybe, though. Maybe for the moment you could try to calm your stomach down? Maybe take an indigestion tablet, or tums? If it's your ED, do not purge! Stay strong, and know that I'm here for you. Keep us updated if you can