Do know the man didn't die because he was put on a ventilator, he was put on a ventilator because he was dying. Totally different thing. I'm guessing the person had health problems you probably don't know about that made him more susceptible to covid. If you're saying you're a high school student, do also know that at your age unless you have some severe health problems you haven't mentioned most likely you will not have a severe case of it. However, because there are things you can do about it that must be done in the early stages if symptoms call for it, are you in contact with a doctor? Have you seen one? Also, a lot of urgent care facilities don't see covid patients, and they also don't do CT scans. Those machines are very very expensive and usually you have to go to a hospital or certain radiology centers to get one, so don't expect you can just walk in and get one. But if you're not having severe breathing problems, it's doubtful they'd give you one anyway as they'd want you to stay in isolation until your symptoms are gone for awhile. You don't have symptoms of covid pneumonia, which is why the doc asked your oxygen levels and if they were suggestive of a bad problem he'd have told you to go in to a hospital. What your are describing is the typical case of someone your age, which is a relatively mild illness you're making more because of your anxiety. Just do what you'd do if you had any other virus, follow your doctor's orders, and chill so your body can heal, which at your age it probably mostly has already. Anxiety just makes you suffer twice. And dude, seriously, wear a mask, get vaccinated, don't be like that. If everyone just had done that from the beginning we'd be out of this mess. Peace.
I'm very sorry you're in this spot, and can imagine that it is all the more anxious because you aren't vaccinated. What you can do is take care of yourself and follow doctor's orders. If they say you are not sick enough to go to the hospital, stay home; and if they say you should go in, go in. I have never heard that a CAT scan is called for even when someone has Covid, I think there are lots of other things they do for Covid. Please try not to be so worried.
I understand how you feel. I had covid last January and had tremendous trepidation and fear. I understand the anxiety this virus can bring and would never undermine how you feel. I'm older, I have health conditions and the unpredictability of this virus can make it very scary. I had an oxygen finger do diddy that I kept checking. I checked my heart rate. I was worried. I was sick for 10 straight days with fever (my whole family got it and I was the sickest). I lost my sense of smell and taste completely. It still has not fully returned and it has been almost a year. Getting worried this is permanent. Miss my favorite Yankee candle scent. Ha. But so much smells like bug spray to me now that it is very annoying. Monitor your symptoms and there is usually a pattern. Between 5 and 10 days is when you can usually predict if you will become more severe or it will pass. You are almost there. REST, get your fluids, take care.