HI, i'm a 20 year old female in college. I have recently (in the past year) been treated for SVT by having a cardiac ablation. However, my heart rhythm issues have continued. I have hypertension and general anxiety. I think the anxiety is more so linked to not knowing whats wrong with my heart. My heart rate is out of control. Resting it can go from 70-120. When I simply walk to class it will be about 140. My doctor has put me on 240 mg of diltiazem, which has solved neither my heart rate issue or blood pressure (still high). My EP told me that I have inappropriate sinus tacky cardia, and that I may just have it for the remainder of my life. My current worry is that when i'm at the gym my heart rate is generally around 175, but will rise to about 200. I get short of breath, so I stop. My doctor assures me that this is okay, but if I'm on medication to control the heart rate and its still that high, I don't understand how thats normal. I also sometimes feel palpations, but I had a heart monitor test and it didn't show any major abnormalities (I couldn't wear it when at the gym). I don't know what to do at this point. I'm at such a loss and feeling so out of control with my body. If anyone has any diagnosis suggestions I would sincerely appreciate it, or just to share your story. Thanks.