Im 19 yrs old and i have been diagnosed with POTS and Sinus Tachycardia about 9 months ago. This all started after i miscarried, ever since then i have not felt the same. I feel tired and weak all day, i cant exercise or lead an active day, all i want to do is sleep. In the morning my HR races soo fast also same when im going to bed. I feel confused all day and very weak. Is there any other meds or is there another disease i might have? I am currently taking atenenol which helps slow the HR little bit but nothing restores my energy. Desperately seeking information. Please help, thanks.