I started having a feeling of fluttering in my chest (upper and down the middle) plus at those times my heart seems to beat hard. This happens all throughout the day. This started about a week & half ago. I m usually not doing anything out of the ordinary. And I m not stressed or have anxiety. I ve been taking vitamin supplements called Thrive by Le-Vel since Jan 1st. They have green tea as the caffeine product. I ve never been sensitive to caffeine. My blood pressure last week was 134/82 which is in the normal,range for me. I take Coreg 12.5mg 2x a day, synthroid 100 mag and 20 mg of Crestor (cholesterol was slightly above normal, my heart doctor wants it a lot lower) Wondering if I need to go to the doctor?