I'm sorry that you're experiencing weird shit with your body and that it's got you so anxious. As someone who's also currently working through a life-changing crisis, I think you should take a step back and breathe. You're still here and you're still alive.
Please try to steer your mind away from self-harm. I'm experiencing similar thoughts, but we can't give up when there's still life to live. Things may be materially shitty and the outlook is whack, but as long as we're alive, we can get through this.
If you're in the US, texting 988 helped talk me down from an extreme anxiety attack over not being able to survive through my circumstance. They'll listen to you, and offer some suggestions with a trained perspective on helping people through crises. It helped me organized my thoughts and be able to see through the worries.
Edit: They also can provide links to services or resources, or tell you when you should go to the doctor/hospital.
If you're not in the US, you may be able to look up some similar resources in your country.
Those are some suggestions, it really sucks to hear that you're going through that. You'll be okay.
You're welcome! I'd say give it a shot, it sounds like you could definitely use someone to talk to.
And oh yeah, health anxiety can be extremely scary and overwhelming, that's valid. But the worst part is not knowing what it is. Our minds are so powerful, we're able to convince ourselves that we have a terminal illness. I've fucking done it, just last year. I thought I absolutely 100% had colon cancer. But it was a hernia, a much less severe issue. I was shaking when I felt my stomach, obsessed over it every day, and started thinking about writing a will, lmao. For 3 months, I felt this way.
I made an appointment to go to the doctor to get this looked at, and it set my mind so much at ease. It's expensive af, and I still owe those medical bills, but at least I know what I'm dealing with.
Try to pull back and take baby steps to figuring out what you should do to take care of yourself. You can do this, you'll get through this.