I'm so scared..

You're not alone! I get tension headaches due to my anxiety, sometimes they will come and go for days at a time and be worse either in the morning or evening. The muscles in your neck tense up, this will put strain on the muscles in your head, so you can experience pain in your jaw, temples, scalp and have a heavy feeling in your eyes. I get it quite a lot, I find ibuprophen gel works nicely on the neck, or any anti-inflammatory gel for that matter. I know your pain all too well with not believing people,  I don't even believe the doctor most times! But please belive me, as a fellow sufferer, everything you have said is typical of anxiety, I've been down the tumour route many times, and lived in fear of it. Try and ground yourself, take a moment to breathe or have a cup of chamomile tea and process the knowledge you have; you know anxiety causes all of your symptoms, you know health professionals would arrange for scans if they though you were at risk of a tumour and you know other people suffer with this just the same as you, hopefully you will calm yourself after processing these facts, and carry on with your life as normal There will always be health anxiety making you panic, but it's important to process correct information and discard the fears and speculations, easier said than done I know, but give it a go when you panic, hopefully you will calm You sound exactly the same as me with these symptoms, so if it'll help you in future, please reply or contact me at any time for some reassurance!