wow! you know what? you are the first person story I heard that has the same issues as me. I have the similar symptoms. everything started when I transferred to the college almost two years ago. I used to be healthy, athletic, and in good shape, but when I started going to college and eating junk foods (pizzas, fast foods, pandas....) bought in school, I found myself loosing my balance and I couldn't breath. I rushed to the er almost dying. my blood pressure was very high (176/98). after a couple weeks, I couldn't breath normally while sleeping and couldn't no longer lie down on my stomach, which was my favorite sleeping position. my stomach was kind of big which was really uncomfortable. then started chest pains. Oh my God! it was awful. I cried a lot of time and the pain is difficult to explain. I went to the Er more than 20 times leading to huge and many medical bills from three different hospitals in my town and forced to drop school for a whole semester. I couldn't focus on studying. it gives me anxiety, palpitations, and discomfort. I undergo all the tests you mentioned in your post and my heart is fine. I took like 4 different types of blood pressure med until I got a new bp med called (edarbyclor) which stabilized my bp to a descent and acceptable range (111/89, 126/98, 117/87, .....) after while stomach issues took over badly and I started taking gas drugs and nothing; still the same. Then my primarily care physician referred me to a Gastro specialist for some med test. I did the endoscopy upper, they didn't find anything and last month (march 2014) did the colonoscopy ( nothing again). now have an appointment this may 30 and see if he can suggest me a ct scan for abdomen which I would consider as my only hope. sometime I even wish that all my test results come positive so we can figure out what going on with me or what is the disease, but all the results are negative. the only thing that came positive was the h pylori test, but the one week treatment killed the bacteria, but still my stomach is big and I burp a lot. and as you said for a little amount of food my stomach gets big like I ate a lot. I already cut acidic drinks such apple juice, soda, orange juice, regular dairy milk, but to me there is no physical improvement. sometime I can even walk, take stairs, or even run or walk fast on my own treadmill I have home because of chest pains, stomach bloating. i feel some pains all the way down in the back of my legs, have horrible headaches like my head gonna explode, also the back of my neck are killing me, feel dizzy when bow down for a while and stand up after or even after laying down for like 15 min when i want to go to the bathroom. man, i am 32 years old, and i am even scared to have normal sex activity because i don't know what might happened during sex because the abdominal pain kind of block my erection. lately i couldn't perform in bed with a girl and believe me it's frustrating. so if you read my post, please reply to me and let me know what exactly specialist you met have told you about these symptoms. and if is there anyone out there with more info about my concern, please write back to me so i can talk about this to the specialist. maybe it's a new disease, or this disease is know and can be cure. i don't know. but thank you guys.