What should I do?

Do some breathing exercises and keep telling yourself everything will be ok.

Don't set yourself up for those things to happen by thinking they might. Find better-feeling thoughts. Go outside and connect with nature. Take a walk. Listen to your favorite music. Be with friends. Hug.

I had a therapist say to me once, for real, "but did you die"?
Total perspective.
Let yourself go through it and acknowledge that you made it to the other side of it. Don't underestimate your ability to survive.

listen to some Bob Marley and try and chill?

Try square breathing. Google it.

You need professional psychological help, I suggest that you seek out a psychologist.

Fight it 🤗

Go lay down in the dark. Call your most trusted person and have them talk to you. Pray for strength and peace. Think about why you are anxious and think about how many people go thru the same stuff.