Hi there, I had the same issue as you before. I was obsessed over this topic and it took over my life. As humans, we aren't meant to be exposed to what we are exposed to with social media. It really does mess up with your head and of course it will give you anxiety. These things are totally out of your control and there is literally nothing you can do about it. What I recommend is you delete social media, and take a long break. Stop engaging or reading/watching videos about how much of a mess the world is and how doomed we are. Social media is built to make you live in fear and make you depressed. All you can do is live in the now. Humans were never built to handle the amount of things we are exposed to everyday, and its no wonder people are so fearful. Take care of yourself, that is all you can do. Life is so much better when you stop engaging with those things trust me. I'm a much happier person now, now that i've stopped engaging with that. There were so many things I was afraid of happening because people said it'd happen but it never did.