Hi Eva - your headaches sound a lot like mine! I had tension type headaches, but only on one side because mine were caused from clenching my teeth at night from stress and I have an uneven bite. If you press on the area where the pain seems to be and it produces more pain, you can be pretty sure that its a tension headache with pericranial muscle strain. I always had soreness on my scalp above and behind my ear, and thats where the headaches always came from. I also got the burning sensation, still do sometimes when I have a bad one, right in the area where the pain is coming from.
By the way, I fixed my headaches by going on an anti-anxiety med and having my dentist make me a bite splint to wear at night so that when I clenched it would be on an even planed surface. Now I'm basically headache free unless I am under a ton of stress.
I hope I helped, and I'm sorry your doctor doesn't listen to you - is there a way you can get a referral to a neurologist? They will take your pain much more seriously and give you an MRI with your symptomology - then you can be assured that its not a brain tumor.
"You cannot hope to build a better world without improving the individuals. To that end, each of us must work for our own improvement and, at the same time, share a general responsibility for all humanity, our particular duty being to aid those to whom we think we can be most useful." - Marie Curie
"The pessimist sees difficulty in every opportunity. The optimist sees the opportunity in every difficulty." - Winston Churchill