Feeling hot in left feet. Jaw and neck!

Good morning sir/madam, am feeling hot only in one feet which is left, since two days earlier I had on and off chest pain since February but then it subsided and sometimes comes and goes . I had done ECG, echo, troponin,chest xray cbc all came normal in month of march but still sometimes i do get pinching pain and poking pain in left chest and also arm and shoulder pains along with that whenever i get this pain i have twitching in my jaw area and palms sweat. Some doctor said costochondritis some said nerve some said musculoskeletal but there's no definite diagnosis but since two days my left feet whenever i sit i feel hot flashes or like a gush of hot blood inside moving am so much panicking and afraid please reply is this serious please pleasee only one feet and sometimes getting twitches all over body especially thigh, jaw and neck