Bad migraine

I've had a bad migraine for almost a full 48 hours now. It started in the afternoon on Tuesday and hasn't let up. I've been off of work for three days now (took Tuesday off because my daughter was sick) this means a nonexistent pay check next week on top of still dealing with the pain. I've tried showers, extra sleep, the combo of meds they have me at the ER last time, ice packs, and cold foods. Nothing is working and I'm going outta my mind with the pain. I can barely sit up on the couch long enough to watch a tv show when I know I can't sleep any longer. I just woke up after sleep 12 hours and I thought it was gone but it's back again. Should I go back to the ER even though I have a doctors appointment tomorrow?