Hi I Am 32 Years Old Women. Height 5'6". For

Hi

I am 32 years old women. height 5'6".
For past 2 months I am having this problem. It started with a mild pain in the right side of chest while breathing which lasted a few seconds
The after another couple of days the same happened to the left side. And now I have severe discomfort all over my arms, chest upper back.
I even feel my neck and Jaw muscles streching. I have been to doctors multiple times. After a number of blood tests they say that
everything is fine. It might be a muscle problem. But I am really not really sure about it as I even feel very suffocated at times .. as if my nose and
ears have been blocked.