Headache and Migraines. And travel job.

I have been facing Headache since 10 -12 yrs. Not regularly but 2 times in a week. Sometimes 3 times in a week. Only on one side of head on left side. Now the condition is that headache starts on while driving if some pit comes on the way it affects my head and headache starts. I usually take Vasograin as antimaigraine or Combiflame as pain relief tablet. Please suggest me what to do. I need your help. I also have acidity and weakness. I am 15kg underweight. I have gone through the test of TSH but it is normal. My age is 29 and my weight is 46kg. Sometimes even taking vasograine it does not help in headache relief. I have consult to many doctors but it does not help me to come over this disease. Every doctors give me antimigraine tablet. I have used amitriptyline antidepressant for 10days days but that I discontinued taking amitrityline fearing for not being addicted to this tablet. It introduce sleepness but I don't any problem of sleepless. I work on computer and travel job.