What can I take to relieve the pain of a migraine?

4 days ago, I started having a horrible migraine.I’m 20 years old, I don’t smoke, drink, do any drugs.. nothing like that. I have been dealing with this non-stop for 4 days. I can’t even sleep (hence why I’m awake at 5 in the morning on a Sunday :( ). I finally bought some excedrin migraine yesterday (which really helped the pain), but it says to only take 2 in a 24 hour period and I’ve already taken 4. It wears off in a matter of 5 hours.

I’ve been battling a nasty cold for over a week and I thought maybe this migraine was a result of blowing my nose every 5 minutes(that’s why someone told me). I don’t have health insurance, so I’m trying to avoid the doctor. Does anyone suffer from migraines and has anyone had one that lasted for 4 days or longer? How do you relieve the pain? I don’t want to take more excedrin than it tells me to take. Please help. I’m pretty tolerant to pain, but this is nothing I’ve ever experienced.