Alot of us on here have had the brain tumor anxiety...I have been there, done that, and wrote the handbook.
Brain tumors are rare, and I am not a doctor, but your symptoms really sound like anxiety.
From what I researched during my phase of brain tumor panic, brain tumor headaches are WORST in the am get better as the day goes on, not worse.
Also, take comfort in your eye exam. When an eye doctor examines your eyes, they are also looking for swelling behind the eye. That would be a symptom of a brain tumor, and the doctor would tell you about it and tell you to get it checked out. The fact that you didn't have this fares well in your favor.
When I had this anxiety, it would not go away until I had a CT Scan,but I had two doctors (who know what they are talking about btw,us anxiety sufferers i think need to learn to trust our docs more lol) who told me I had nothing to worry about...and I didn't.
Also, as soon as I got a clear CT scan, my headaches went away!!
Good luck to you, see a doc if it will make you feel better, and try not to worry! You will be fine!