TMJ or brain tumor ?

alright iv posted here before so you may recognize my user name. I hope you dont get sick of hearing from me which you may, but i really need some advice. Latly iv been posting in the "brain tumor" forum and not getting much luck probably because i shouldnt be posting there without other symptoms anyhow.
I do have TMJ, this much is obviouse, i got it when i got braces but at first it was just poping noises, 5 months after i got my braces off i notices weird sharp very short lasting head pains on both sides of my head and ocasionaly above my eye. this worried me alot so i went to the doctor and he did a neuro exam which turned out normal. the head pains continued for 4 months so he then ordered me a CT scan along with a blood test a heart monitor and urine test. all of the tests came back normal but im still waiting for the CT scan results because it takes a little long then the other tests and they should come in next week. My problem is the headaches have recently changed from the sharp short lasting pains to a constant tight pressure around the back of my head and sides of ym head and an ache in my forehead. this headache lasts most the day with periods of it going away then comming back. This worries me alot and i read that CT scans can often miss brain tumors. Im wondering if you think this is my TMJ getting worse or if i should ask for an MRI to rule out a tumor if the CT scan results come back negative. I also spoke with my mom to get me into a chiropractor in the meen time. Im 17 year old white male in reletively good shape. thank you