Hi,
Chest pain occurring without associated symptoms like
Radiation Of Pain to the Neck, Back, Jaw, Arms, Sweating, Breathlessness is less likely to be of cardiac origin.
You also mention that you had twitching of Muscles & a Chill all over the body could also mean
Stress,
Anxiety. Your BP would have transiently shot up.
Have you been on any regular medications for Increased BP?
A few Lifestyle Modifications like Exercising Regularly, with some Yoga would help you control your anxieties, if these measures fail you could get a consult and start some anxiolytics.
Your diet should be Salt Restricted, Low Fat Diet.
Incase you have these symptoms quite frequently then please get your
Thyroid Function Tests done along with 24 hour Ambulatory BP monitoring.