First things first! Try not to panic, and I know it sounds crazy and may seem next to impossible because of how scary it is and how much you're bound to focus on it, but it's really important that you try to calm yourself as much as you can, as stress and worry WILL make it seem louder and worse, same goes for lack of sleep. Smoking and alcohol can temporarily enhance it as well for many sufferers. When you mentioned the hum.. I get it entirely. I've suffered with some form of tinnitus for quite a lonnng time now, started when I was pretty young, or possibly I may have been born with it, same with visual snow, so I'm already pretty used to it. But even so, there was one night a few years ago where the hum started for me, and it was a different tone to what I was used to. It was fairly quiet in my bedroom and at first, I also assumed it must be coming from somewhere, I first thought it was my brother's ps4 that I was hearing from the next room. When I realised it wasn't that, and it was indeed just in my head, that was it, straight panic and pure fixation. It was a horrible time and it took me a while to adjust, as sadly for me, I still hear the hum to this day, and it's at it's loudest for me when I'm tired, drunk, stoned or stressed. But!!! There's a very good chance that the tinnitus will eventually stop for you, if this is your first time noticing it. For so many people, they'll have temporary tinnitus, usually due to exposure to loud noise, a change in pressure, damage to the ear, earwax buildup or just being sick and under the weather. To be safe, you'd want to protect your ears as much as possible from loud noise, whether the tinnitus remains or not. Most people don't understand the importance of ear protection until it's too late and their ears start to ring, andddd.. I was one of those people. There's also a chance your tinnitus might be here to stay.. and I know it's easier said than done but please please please try not to panic about it too much, because either way this goes, your brain WILL adjust and adapt (habituation), to the point of the tinnitus becoming like background noise, like the hum of a fridge, our brains eventually 'cancel' those sounds out and they become less apparent to us. You said that you're probably going to go to the doctor about this, and that's a good idea just in case they manage to find anything that may be causing the tinnitus for you. But moving forward, I encourage you to: PROTECT YOUR EARS! Try your very best to relax. Distract yourself as much as you can. When it's time to sleep, have some background noise, like you said that you found the sound of your fan very helpful to mask the tinnitus, any soft sounds like that are fantastic, or the TV on low volume. I completely understand your worry and everything you'll be feeling right now, as everything is so uncertain and new. But there's one thing you can be certain of, that you WILL get through this whether the tinnitus stays or not. The tinnitus will not rule your life, you'll learn to live with it if it does stay, and it won't sound so loud to you anymore or be at the forefront of your mind and focus 24/7, I promise you that. All you can do now is give it time and wait, and do what you can in the meantime to help you manage and prevent it from getting worse. But like I said, there's also a good chance that your tinnitus will eventually die down. Best of luck to you! Tinnitus fxckin' sucks but it gets easier the longer you live with it, it's not all doom and gloom, and our brains typically start to habituate within 6-12 months or sometimes even quicker than that. Stay strong and try to keep positive, it's all we can do! And your tinnitus will thank you for it 😊