Hello Welcome in H.C.M. for consultation. I have gone through your query regarding sore throat, fever, pain in neck and chest and left side jaw, ear and arm. As you said that you are having this problem for a week, though now you are not having any fever but other problems are still there and you are much worried for chest pain. Considering your complaints I suspect that you are having upper respiratory tract infection with referred otalgia with gastritis. Your sore throat has given rise to referred pin in left ear and due to your preexisting fever and sore throat you have developed burning and pain in chest and neck. You have not mentioned about your age and any other medical problems as hypertension etc, so here it becomes necessary to rule out any cardiac involvement by ECG and TMT. If you are found free from cardiac involvement than there is no point for worry and take antibiotic, anti inflammatory, Mucolytic and antacids to get relief. With regards.