Help. I woke up one day after getting very little sleep with an dull ache in the back of my head, it lasted about a week. I thought it was a tension headache, which i've had before, but it came back, and I noticed that when, I burp the ache goes away. The ache isn't constant but only when I feel like I have to burp and once I burp, it's relieved. It's been like a month and a 1/2. I don't have any other symptoms like dizziness, fever, impaired speech or anything. What is this?