Don't worry, be happy! (repeat until you believe it)

I am a worrier & have always been a worrier.
I don't think I can remember a time in my adult life when I haven't overthought absolutely everything ... I just accept it as being part of who I am ...
Over the last few years though, it's become increasingly difficult to push the worrying thoughts aside, and I have found them getting the upper hand, which then results in crippling anxiety attacks.
The inability to push the thoughts aside comes from a complete lack of self-confidence ... 
The inner voice that used to reassure me that 'You can do this, stop worrying so much about it' has fallen silent, and been replaced by a shadowy Spectre, who feeds the feelings of uselessness and panic.
I've been trying various calming techniques, visualising a 'happy place' etc and they seem to be really working, especially last thing at night.
I came across a really interesting website that has plenty of useful strategies to combat anxiety, and one of them really appealed to me... Using a meditation or 'Spinner ring'.
Anyone who has met me will notice I wear big pendants, usually made from a big crystal cab with a sterling silver, open backed setting. This is because in moments of unease, I rub the back of the crystal cabochon and with my thumb, and the front with my forefinger, and it helps me to focus.
I really like the idea of a thumb ring that I can use in a similar way, to provide me with rhythmic comfort, because it is less noticeable in public situations.

I did a search on etsy, and found one, in the UK... and it was the exact size I needed too! 

So, hopefully this is another way I can help myself keep calm when inside I feel like I am drowning?

*fingers crossed*