Supplements for chronic stress

I have pretty chronic stress. It has gotten so bad that my body is starting to get really tight and hurt. I have been having a ton of upper back tightness and it's really uncomfortable.

I know the stress is the cause of it, because on days where I'm able to clear my head and just be chill, the tightness/pain gets a lot better.

Can anyone recommend something that is good for bringing stress down, clearing your head etc? The problem is I'm just worried about so many things, but I find it hard to stop. I can stop for maybe like a day here and there, and then I just fall back into the cycle again. It's almost like a habit.