worried i may have a brain tumour

I am genuinely scared that I may have a brain tumour. I am the type to google all my symptoms and then freak out thinking i have all these things wrong with me when I’m actually fine but I have quite a few of the symptoms. I have mild headaches, numbness, nausea, blurry/double vision and excessive yawning. I have a doctors appointment tomorrow which is just for a prescription but I’ll be mentioning this too. I have told my mum about this and I’m only 14 so I can’t really deal with this on my own. I have told her about how I have a lot of the symptoms and she just tells me “if you had a brain tumour, you’d already know by now, you’d be in a lot more pain” and just tells me that I definitely don’t have one. And she may be right, but of course I’m just scared. If anyone had any advise or is somehow able to reassure me, that’d be great :)