I had a migraine all day yesterday. This morning it was totally gone. Just now I lay down on my bed and all of a sudden it came back really strongly. Because I have had BT fears before I know that headaches that find on suddenly, are worse or triggered by lying or bending down and don't resolve with medication are signs of brain tumor. The pain is throbbing / pounding and worse when I move. I am terrified that I have a brain tumour and am now on the verge of a complete panic attack which hasn't happened in ages :(