TAKE THE IMITREX!!!!
Imitrex works best at onset, but will work even during the attack. I do best if during the attack I take it, and take something like a painkiller AND lay down...
Try not to wait so long next time...if possible.
Maxalt never did work for me either, it was like eating a tick tac for a bullet wound.
Glad to hear you're not taking all of the medications at once. I agree with everyone else's posts as well. Get the imitrex, it may work even in the middle of a headache. Get rid of the Excedrin. Caffeine is a bad trigger for me, sometimes it works in the short terms but I always pay in the long term.
Something we use a lot in Canada for nausea is called Gravol. It stops nausea and makes you sleep. On a recent trip to the states I found it under the name Dramamine (sorry if it's spelled wrong). I've never used phenergan, so I'm not sure if it's the same.
Have you tried some non medication alternatives? Relaxation, massage, warm bath?
If once you've tried the Imitrex it doesn't work, I would make an appointment with the doctor and go and see him / her.
Reglan is good for nausea too...it makes you less sleepy than Phenergan and is inexpensive also!
My favorite is Zofran (Very powerful-gernerally used for cancer patients, but all that would work for me for the longest time) but it is EXTREMELY expensive.