I Had A Concussion 11/16/2014 And Since Then I Have

I had a concussion 11/16/2014 and since then I have had brief, intermittent migraines untiI now. I have been having daily migraine headaches for the last 3 weeks, sometimes accompanied by tremor, dizziness, vomiting and nausea. I am also burping frequently even after taking an anti gas drug and regardless of whether or not there is food in my stomach. I have an appointment with a neurologist, but they cannot see me until 9/11/2015. Any suggestions are welcome.