Frustrated

I ended up in the ER the other night and once again I had to hear from the doctor "so, you have a headache?" My partner piped in and advised him that I did not have a headache, I had a migraine. I don't know why it is so important for me to make that point, but I think it minimizes that intense pain of a migraine when a health care professional refers to it as a "headache".

I recently moved to this community and I cannot find any doctor who will accept a new patient who suffers from pain. Apparently, there is a major issue with drug abuse in this small town, so everyone is suspect regardless of your history. I told the ER doctor (as I was fighting through tears) that I could not find a physician since I moved here and I needed to ask someone about options for migraine relief. I brought up nasal and suppository drugs as I become so nauseous when I get a migraine that I cannot take anything orally. He stated in no uncertain terms that no doctor in this area would prescribe any pain medication. 

How can I have a conversation with a physician to determine whether I may or may not need pain medication for migraines without them assuming I am a drug seeker? I actually get anxious about speaking to a doctor about my migraines become I assume they do not believe migraines are a problem.

How can I make a doctor understand how truly painful and debilitating my migraines are?

Any help from any one would be appreciated.