I do this, but finally I realized that if I am going to overthink everything, I may as well think about something pleasant. Find something to focus on besides your illness -- music, TV, it doesn't matter as long as you can enjoy focussing on it. I sometimes think about all the people I have loved, even those now dead, and those who have loved me. I talk to my dead mother -- my husband says as long as she doesn't answer, there's no problem!! -- I study the adverts on TV (more interesting than the shows sometimes), anything to distract and help myself. You are not lost, just ill. As my grandmother used to say, rather meaninglessly but comforting nevertheless, "This too will pass."

So sorry, I hope it gets better for you.
I still have some of the same feelings.
But it is better

Yes i play games on my phone to preoccupy my brain tv isn't interesting or i can't stay focused on it long enough

I do the same. I was pushed out of my job (of 8 years) for getting sick, my children are all leaving the nest, marriage is at an all time low, (husband wants to walk), severe fatigue slowly lost all my friends (friends take a lot of energy. lol) Now I sit in my room all day in the silence! Prime time for me to think, think, think, think, and over think. Know why prisons have isolation as the worst punishment. To much time thinking, and your thoughts can drive a person insane.

Whatever brings you joy- do that!