migraines

I have had a migraine for 3 days now it won't go away it even wakes me up out of my sleep no matter what I try it doesn't go away I have been vomiting and just really dizzy anytime I stand up I can't sleep i don't know what to do I'm thinking about going to the hospital to maybe get some help but I don't know if it's worth it I'm 23 weeks pregnant and this whole thing is killing me