About 2 years ago, I started having palpitations. I went to the doctor and he told me that my cholesterol was dangerously high (I'm 26, 6'4'', and 155 lbs.). Since then I have changed my diet completely, started taking fish oil daily and have dropped my cholesterol from 254 to 180, which the doctor says is a good number. The palpitations still happen (not near as severe or as often). Anyway, I used to be a regular marijuana smoker and about 6 months ago I smoked with a friend and started getting this pain in my chest. It scared me a bit, but not enough to go back to the doctor. I didn't smoke again for a while, but then about a month later I smoked again and had the same pain. So I quit smoking all together (I smoke cigarettes still though). About two months ago the pain came back without smoking and didn't go away. Sometimes it will be on the left side (most often), but other times it will be on the right side and sometimes on/around my sternum. I went back to the doctor and he told me that the pain could be caused by anxiety and panic attacks. I had an EKG done and the doc said that there were abnormalities that he thought could be related to my thyroid, but my blood work showed that my thyroid was fine. He then sent me to have an echo cardiogram. The doctor that reviewed the echo (not the same doc) said that the doc that did the ekg thought that ekg had shown that I had already had a heart attack, but according to the echo, that was not the case. He said that according to my echo, my heart was fine but he wants to do a stress test to be sure (scheduled for 5/14/12), but he was almost positive that my heart was fine. Then, more recently, I noticed some sort of discomfort when taking a deep breath. I don't really know how to explain it...wasn't a pain really....just abnormal...it felt like something wasn't right. I've noticed it a couple more times since then too. My doctor went through 2 prescriptions before he put me on .5 mg xanax. The pain goes away with the xanax and the palpitations too, in fact I haven't noticed the breathing...situation, either. Since the pain has gotten better, I've been more active, I cut back on how much I smoke (trying to quit), barely drink anymore (used to drink nearly 10 beers a night...am now drinking my second beer in 4 days to try to cope), and have ran nearly a mile every day for the past 3 days. Now to the part that is troubling me. I have been on the xanax for nearly two months now, and sometimes when I take the amount that I'm supposed to (1 pill three times daily), the pain won't go away. There have been many times this month that I have had to "double up" just to get the pain to go away. Because of that I do not have enough xanax to take even the recommended amount for the remainder of the month. So...today I tried to go without taking any just so I can take at least 1 or 2 for the remainder of the month. I have had the pain all day, I had a palpitation, and experienced the breathing problem all in one day without xanax. I am not trying to catch a buzz from the xanax, in fact I do not like the "high" you get from xanax at all (took about 1.5-2 mgs when I was 18 and didn't want to move or get out of bed for about 2 days). So... I guess my questions are 1) can all these pains and discomforts (especially the breathing thing) be caused by anxiety and 2) If it all is anxiety, how can I go about asking my doc for a slightly higher dosage that hopefully won't affect me in a way that I don't want (as I explained before) without him thinking I'm just another addict or dealer or something? I have an extremely stressful job, and I have always had problems with depression, anxiety, etc. I just want to feel normal, live healthier, and not be scared every day.