Hello. I ll get right to it. When I stand up, my heart pounds and the rate jumps up significantly. I have the same thing happen when I walk up my stairs in my house, about 13 steps only. It s to where I feel as though I ll collapse if I don t quickly sit/lay down. I ve also been having chest pains that come and go. They are usually on the right hand side, mainly under my armpit, but are sometimes on the left, and sometimes in the middle, near the solarplexis . I ve recently quit marijuana after being a regular smoker for over 10 years. I used to smoke the marijuana in a particularly harmful way, which would be hard to describe, but basically instead of a slow inhalation like with a cigarette, I would take in a large amount of smoke all at once. I don t know if this is relevant information, but I thought I d mention that. It s been about 4 weeks now since I ve quit. I ve had absolutely no marijuana since then. I ve been diagnosed with anxiety which is fairly severe, and am currently taking lorazepam to help. I do notice that my symptoms are lesser when I am calm, and have taken my medicine recently, but I still get the symptoms even when I m not anxious, just not as severe. I ve had ECGs(3) done recently(I went to the ER because my heart was pounding uncontrollably) those came back normal, and I wore a heart monitor for 2 weeks that also came back normal. I haven t had any other tests. I m scheduled for a stress test in about 2 weeks, so I m hoping that will give me some answers, I just thought it d be nice to have some input asap. I also recently changed my diet completely, when I started getting these symptoms, in particular when I first realized how high my BP was, I was having readings of around 165/95 and even higher. I had some readings where my systolic was over 100, I think the reading was 164/114, this is from one of those machines in the pharmacies. When I had that last reading, I was in the midst of a panic attack, so I imagine that s why it was so high, but even normally I would get readings like I mentioned above. I also had more reasonable readings when in the hospital of about 132/78. Anyhow, I gave up fast food and junk food completely, gave up pop completely, I now eat mainly fruit and vegetables, the only meat I consume is lean chicken. I watch my sodium, and added sugar, so my diet is pretty healthy now, but my heart still bothers me. I m a 26 year old male, who was very active even just 6 or so months ago, but I had an injury that kept me frome excercising, so I was doing a lot of sitting around and smoking weed(embarrassing to admit), and this is when I first noticed the symptoms. When I walk uphill or exert myself, I feel out of breath and my heart pounds. I m really worried that I have heart disease/failure or blocked arteries, and as I ve mentioned have only had ECG and halter monitor tests done. I also have bloodwork that I am trying to get to but my anxiety has kept me pretty well house ridden. Ok I ll leave it there, thank you very much in advance for your time.