I'm really exhausted

Hi, I'm someone who's been dealing with a lot of anxiety and health issues lately. I don't remember worrying or thinking much about my body until two years ago when my father passed away and my grandfather went through a difficult time, but thank God he's doing well now and here with us.

But because of those damned moments, I think my perception of health and my body was seriously affected.

1. A year ago, it started with an intense headache that lasted a long time, and my anxiety took over my thoughts. It was a difficult time, but the feeling disappeared as the weeks went by.

2)Months passed, and I felt a sharp, stabbing tension and pain in my lower back. My mind was constantly focused on it, and a traumatic moment was when I woke up one night feeling it and cried. But then, two months passed, and the sensation disappeared as soon as my mind stopped paying attention to it.

3. Last December I started feeling complaints and a stabbing sensation in my knee. Since I was already "used to it," I thought it would last a while, but no, that damn sensation lasted for two months. There were days when I only felt tension and real stabbing pains. Mentally, I was tired of thinking about whether or not to go to the doctor, but the sensation didn't progress; it was simply constant. And yes, with time the tension disappeared, and now my knee is as if that never happened.

Currently:

since the end of April, I've started noticing something unusual in my vision (I have floaters, but I never paid attention to them), and it probably started because my cousin mentioned that he had bad vision in one eye (he actually has astigmatism, nothing more). But because of that comment, I started checking, testing, and verifying my vision in both eyes second by second. It messed me up. Now I feel like I see things in the sky, like white, black, and multicolored dots appearing and disappearing. The light has become brighter for me, my eyelids feel more tired, and I've had nightmares and constant thoughts about whether this is real or not. But there was a moment that really scared me. When I was running, I started feeling tired and exhausted, and suddenly, I saw my vision throbbing in sync with my heartbeat. At that moment, I thought I was truly lost...

I'm exhausted. I feel like every day is repetitive. The feeling and the visual perception are still there. I've lost interest in my hobbies and pastimes. I feel like any place could affect me. I've had good days and bad days, but the feeling persists... How do I cope with or overcome this? :(