<s>[INST] I AM 43 YEAR OLD FEMALE, THE SYMPTOS A HAVE BEEN EXPERIENCING ARE PALPITATIONES Y SOME TIMES CHEST PAIN, FOR 2 YEARS . MAY HEART SPEED UP 140, 150 BEATS FOR MINUTE, THERE IS NO EVIDENCE FOR SVT, ONLY SINUS TACHICARDYA. MY DOCTTOR DID A LOT OF TEST, BUT NO DIAGNOSTIC. I NEED HELP PLEASE. [/INST] Thanks for your question on Chat Doctor. I can understand your concern. In my opinion, we should first rule out arrhythmia (rhythm disturbances in heart) in your case. So get done ECG, 2d echo and Holder monitoring (24 hours continuous recording of ECG). If all these are normal then no need to worry about arrhythmia. Sometimes, stress and anxiety can cause chest pain, palpitations and sinus tachycardia. So 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>