Possible Brain Tumor thoughts

Hey!
I’m Ali and I just got the news last Monday that it is possible for me to have a brain tumor. I was in a coma 4 years ago due to another illness that I have, and symptoms now are just starting to show up, behavorial changes, anger and frustration issues, issues with filtering speech, and also some issues regarding digestion, heart rate, breathing…
I’ve been referred to another doctor, and am just waiting to get the call so I can go see him. He’s most likely going to order another MRI (I had one done a few years ago) to check and see whether it is a tumor caused by some scar tissue that I had from my coma, or possibly an area of my brain that has died.
I’m going through a lot of emotions right now, but for the most part I think I’m doing ok. It’s hard, but I think it’s also a relief that now we’ve at least narrowed it down to what organ it is. (I’ve been undiagnosed for 3 years)
It’s confusing to feel all these things at once, and I’m not sure I want to know now. What if it is a tumor, and it’s cancerous and I’ll need chemo and radiation? If it’s not a tumor, what sort of treatment do I get for that? There’s a lot of questions in my head right now.
I don’t really know if I belong on this site yet, but I just thought I’d post and introduce myself!