I am 23. 5'1" 100ibs in decent shape. Within the last 6 months I've been experiencing a high resting heart rate, which makes me fatigued, gives me some muscle pain and anxiety. I have had lymes disease, and mono. Other than that my health is good. I have been diagnosed with anxiety, but i feel that it is my high heart rate and always being physical uncomfortable that causes the anxiety. I have had EKGs done and an Echo which have shown a healthy heart. I feel faint often, but have not fainted. Any ideas or suggestions?