What Causes Severe Pain On Back Side Of Head?

hi.. I'm 19 years old. I've severe pain at the back side of my head. I've figured out that it occurs while i go out in direct sunlight, eat sour things or fish.. Before and after my periods, when i skip meals. It worsen due to light and sound. Pain remains for nearly 2 day. I don't vomit but feel like vomiting. I can't talk or move. My head turns hot and Applying waters or ice helps. Please tell me is this migraine? Where can i get it tested and treated in Bhubaneswar, orissa.