If it is covid and you are not high-risk, be sensible and monitor yourself for worsening but don't panic. Your symptoms sound right. Corona is not a very deadly virus, unless you are up there in years, and as far as I can tell reports of lasting damage to people who do not have very uncommonly severe symptoms are exaggerated (there is an abundance of evidence for all sorts of lasting effects, but the numbers overall suggest that your individual risk for them is very minimal). It has killed so many because it is so very contagious, so by all means be overcautious about your quarantine, but if you convince yourself you are going to die you will put yourself through a lot more pain than you might otherwise, unnecessarily, which will hinder your recovery and make it difficult to assess your actual symptoms. It is a nasty bug, and a catching one, but keep your chin up. You'll be in my prayers, which are to satan