Frequent headaches and itching. Is?

I am getting headaches whenever my meal gets delayed from my usual time. It last entire day even if I had meal later on. The headache is like tight band around the head. To subside the pain I take a cup of black coffee as dont want to resort to painkillers frequently but sometimes even that does not work. I am not on any medications and my meals are not spicy/oily. I had even cut off my tea intake to 2 cups/day. Also since few days my body is itching at any random place. It starts with mosquito bite like blister and then it starts itching. I am unable to figure out if its an allergy or something else since there is no change in the diet. Nothing new is introduced. I was not sure what kind of problem is regarding my headache hence I posted it in general category. Please suggest and let me know which specialist should I refer to. Also if possible please suggest generic medicines. Not in condition to afford hefty medical bills.