Hello I am a 30 year old female healthy, with family Hx of heart disease and hypertension. Yesterday day I was DXed with Tachycardia. Heart rate of 127 at the highest. I also had left arm pain, bilateral leg aches/pain. I have also had insomnia (over the course of 3 night) due to chest pains, nausea/vomiting, lower abdominal cramps. Today after being put on Metoprolol Tart 25mg BID the CP has subsided, leg pain gone, left arm pain almost gone. Now with I today I had a very bad tension headache now resolved after heating pad application for 20 mintues. Could this be due to tachycardia, stress, or is something else going one.