ButterfliPrincess11, I am sorry you are so distraught.
I'm in a similar frame of mind today - it's awful.

It's very hard to give good advice, as I find it difficult to deal with these overwhelming worries myself in an appropriate manner.
I try these days and give myself quiet time and shut off / down somehow.
Sometimes I need a really good cry and then am so tired and exhausted that I can't really worry quite as much any longer. I'm not sure whether that's great advice, it's just what I sometimes do.
You can try breathing meditation and mindfulness. I've tried it sometimes myself and have been told to keep it up.
Mainly I just try and shut off my mind in some way and need to withdraw from the world for a while.
If I can think of anything else, I'll let you know.

I hope things are getting better very soon! Take care of yourself!