The fact that you have frequent headaches does not mean that you have a brain tumor. If you really would have a tumor, then you would have a loss of balance, memory problems and a huge number of other problems. The reason most likely is a banal overwork. Nevertheless, MRI is a great idea, because it will surely reassure you. My friend recently had wrinkles and acne on her face and she started to cry. She constantly cried and said that she had skin cancer. In the end, I found a good clinic for her and she went to There, doctors told her that she had a classic allergy due to cosmetics and that she should not worry about it. After cleansing her face and special procedures, her face became perfect and she was ashamed of the fact that she was delirious before that :)) So do not worry!