<s>[INST] i am a lactating mother and am experiencing slight tightening in my middle of the chest for a week now. no pain or great discomfort but a feeling of tightening throughout the day? i am 34yrs old, 5ft 4" height 72 kgs weight, have no major healtChatDoctorplaints, sugar BP all normal. [/INST] Thanks for your question on Chat Doctor. I can understand your concern. No need to worry about major heart and lung related diseases because you are young and having normal blood pressure and sugar. Sometimes, stress and anxiety can cause chest tightness. So better to consult psychiatrist and get done counselling sessions. Try to identify stressor in your life and start working on its solution. You may need anxiolytic Chat Doctor.  Don't worry, you will be alright. Avoid stress and tension, be relaxed and calm. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks. </s>