How does one do breathing techniques? Im trying to deep breath to relax and stop panic but it MAKES IT WORSE!!

Reasons why.. I try to get all the air in stomach diaphram and my stomach muscles SHAKE or Tremor...(Could this be from unknown anxiety tension)... This makes me worse. I always feel uncomfortable in stomach as in dull weight and it may be tension or something but I shake doing crunches all the time and tring to breath makes me more anxious...

I always have dull aches in wrists and muscles and joints...I cant read or concentrate.

MY STOMACH PULSES WITH HEARTBEAT AND SEE VISIBLE HEARTBEAT IN CHEST ( is this normal or can someone explain all the symptoms and explanations to why I feel them as I am going crazy and dont know why.

I NEED ANSWERS an could this all be from anxxiety or worry?
is this possible as I am going crazy with anxiety ove th etoxicity issues and other tests that doctors dont do.

PLEASE SAVE ME AND TEL ME WHAT TO DO. OR EVEN EXPLANATIONS OF SYMPTOMS OTHERWISE I DONT KNOW HOW MUCH LONGER I CAN TAKE THIS TORTURE OR WHAT I CAN DO.