Why do I feel like I’m going to die?

I know this may seem weird but I keep feeling like my life is gonna end soon. Idk why I feel that way I don’t know how to feel about it or what to do about it. I feel like after I take my second dosage I’m going to die. Idk if it’s because of all the sudden deaths in my home area, covid related and not. But I’m kinda scared 🥺