Talk to Internal Medicine on Palpitations And Body Aches

Hello Doctor, I am an 18-year-old female seeking guidance regarding ongoing symptoms for the past 2 months. My main concern is heart palpitations and high heart rate. I have recorded a maximum HR of 150 bpm on ECG, around 110 bpm during doctor visits, and 90–100 bpm at rest normally. I have undergone 4 ECGs, all showing sinus tachycardia. I have been evaluated by two cardiologists. My echocardiography is normal, and no structural heart disease was found. Along with this, I experience full body aches, mainly in the neck, shoulders, arms, calves, and sometimes joint discomfort. I also have tingling sensations, cold hands and feet, and occasional numbness, especially with sitting or activity. Relevant history: Had dengue fever 3 months ago These symptoms started about 2 months ago and persist Investigations done: Echocardiography: Normal Abdomen & pelvis ultrasound: Normal TSH: 1.28 CBC: WBC 11,000; Hb 13.1; RBC 5.1; Platelets 371,000 CRP: 11 esr 42 hbA1c 5.1 Random blood sugar 101 I