I personally don't see the problem with it; if it eases the anxiety, you've found a way to ease anxiety that does not violate anyone, that doesn't harm anyone, etc.
I also use it to release tension and never thought of it in a negative light. Thank God for a way to relieve tension.
The guilt is something you may want to explore and hopefully come to a place of acceptance.
If there are religious concerns, maybe that's an area to be explored as well, with a healthy religious advisor.
If I am hungry I eat, if I am tired I sleep, if I am anxious I do what it takes to relieve the anxiety.