i dont think it would be a physical problem, but maybe i need to care more about calcium , anna , in the other hand most of the times i'm suffer from anxiety
If you don't think it is physical, it means, that you don't know.
Step one is therefore to exclude it, no matter how convinced you are that it is not.
It could be gastritis, pancreas problems, an ulcer, and what not, and the body tends to cramp around abnormal areas, you see?
So if money isn't keeping you from getting hat check up, I would do it.
Then, if everything is alright, you know it is mental or emotional.
Pain without organic abnormalities is usually an imbalance in the functions.
It can be because of too much stress, too much effort, and so forth.
My father was a internal specialist, as you may know, and he used to say when I was beside myself:
"Stop watching yourself, do some work and concentrate on doing it properly, or relax and think of something nice and joyful. "
This has worked for me many, many times.
Pain is a warning signal that something is wrong.
It warns us to continue
with whatever it was that we did while it arose and it is stupid to ignore it.
Usually, everything calms down when we rest.
So, if it arises during meditation, you are doing something wrong and must seek the advice of a teacher.
That is my additional advice, -all else is groping around in the darkness, because we can never guess.
But I have a feeling like you hesitate to or can't seek the advice of a doctor or teacher.
Am I right?
PS: Anxiety affects the muscles and circulation badly.
Try to locate where it comes from, what causes your fear and don't only try to meditate it away, without tackling the reason as well.
Whatever it is, try to find a sangha, besides being embraced by us,
but also try to meet people irl. Can you?
People are a comfort, sometimes.