Just caution, don’t turn it up to much and don’t overdo it. More is not better. A style of it can be had cheaply with a TENS 7000 and ear clip set off of Amazon. You will find research and anecdotes to support your decision either way. That’s a truism that’s always been true but perhaps especially in this day and age of overstimulated people and an endless amount of content generators.

Ultimately if you think it’s working then it’s working.

A lower risk way is probably breathing techniques and meditation apps.