Struggling with fear of death - please dua and advice welcome

As-salamu alaykum. I’m not sure how to explain this well, but I’d really appreciate hearing your experiences and maybe some reassurance that nothing bad is about to happen 🥲 For about two years I’ve been dealing with intense death anxiety that comes and goes, and it’s gotten much worse lately. There was a time about a year ago when it was so bad I wouldn’t let myself sleep because I was convinced something would happen. I only slept when I physically couldn’t fight it anymore and even then just a few hours. It’s a bit better now, but the intrusive thoughts still hit me. Every time I try to reach out to someone, make plans, or mend something from the past, my mind tells me I’m only doing it because I’m about to die and I’m “making final amends.” A few months ago I unintentionally hurt someone close, and recently I reached out because I genuinely miss them and wanted to make things right. Now my brain keeps saying I only did it because I’m about to die, and that scares me so much. I can’t stop thinking about it and I regret reaching out - my heart sinks every time I remember. This issue has changed how I act: I barely text people or go out because whenever I try, these thoughts ruin it for me. It’s also my birthday month, and that somehow makes it worse - I’m terrified I won’t make it to my birthday and keep looking for signs. If anyone has experienced this or recovered from it, please tell me it’s anxiety and that people like me can go on to live long, healthy lives. I’d be grateful for dua, practical tips, or just hearing what helped you. Jazakum Allah khair.