I have an itchy feeling within the left side of my chest and pain but ii don't exactly know where the pain, is occurring what should ii do?

See your doctor: The symptoms you are describing could be a number of things but chest pain is one that needs further attention and evaluation by a doctor. An 'itchy feeling' with pain on only one side of the chest could be the initial symptoms of shingles(herpes zoster), and a red vesicular(pimple like)rash may or may not follow shortly. It is however impossible to be certain without going to see your doctor.

Could be shingles: Therwe are many possible causes for what you describe, but shingles (herpes zoster) is what your description reminds me of. If red spots and clusters of small blisters develop, i recommend seeing a doctor asap to get oral ant shingles medication to clear the rash faster and help prevent residual pain.