I do sympathise with you Lullubelle500 because I think many may have similar feelings to yours, especially just now.
I am a natural catastrophiser (if that's a word?) constantly feeling that something bad is about to happen.
I now find that I am largely able to manage these feelings by endeavouring to stay in the present.
I know it sounds a bit of a cliche, but if you just take notice about what is happening at this moment in time, without imagining what may or may not happen in the future, which may be out of your control, it does help, but takes a bit of practice.
I find it helpful, without putting any pressure on myself, to think of three things when I wake. Something you can see, something you can hear, and something you can feel, ie softness of the bed. Then for at least two minutes be aware of your breathing, ie count one as you inhale, two as you exhale, or something similar.
This helps to start the day, and I can repeat this during the day if I do feel anxious, it helps to ground me in the present.
Hope it helps a bit.