Smart Yahoo People, Please Help Me?

Hi my names Jeff, im 21, 5'8", 165lbs. excersize regulary./cardio and strenth training. i smoked and chewed for 4 years and quit 7-8 months ago. I've been on and off depression meds since i was 15.. Im not alregic to anything, and have no health issues. the last time i went to the doctor and told him about this, all he did was re-perscribe some depression meds.. they even hooked me up to an EKG machine, but said my heart was healthy and workin normal. the problems that i will be explaining I've had my whole life, and they've contributed to extreme anxiety, and freezing up when speakin around others, in the clroom reading and even recently around my family. its so embaring, it really has wrecked my life and im resorting to yahoo answers for a last resort. I know there are many smart people out there and im hoping someone may be able to help.. ive been having problems breathing, holding a deep breathe hurts, When I speak vocally I can't really say more than a few words without my lungs being exausted, the air seems to escape very quicky through my mouth when speaking,and i have to breathe...the air escapes faster with certain words and sounds than others, and i can say some more clearly and some sounds are hard for me to say crisp because the air slips out so fast. . My upper back muscles have been hurting, and the more i stretch my upper back it feels good but kinda hurts at same time. They are getting sore now from really stretching those muscles hard.,still having irritating pain and discomfort when i move my back side to side. When I drink soda it gets hard to breathe and to catch my breathe, even harder than it is normally When i drink more water its easier to breathe a bit. but doesnt help all that much more.. my heart always feels heavy in my chest, and pounding hard most of the time. Only time i feel a lil normal and can talker normal is when i awake from sleep for about 20-30 mins. Then mild anxiety rolls thru me.. prolly 2-5 at all times, and gettin around 7-10 when around alot of people. Ive been drinkin alot of alcohol and thats the only way to kill the anxiety.. I've been exercising alot latey and I've been jumpin jump rope to getmy heartrate up, and build up stamina, but i can only excersise so much and its not helpin to much with the anxiety or ability to help me speak better/clearer/more without needin a breathe.. this **** is wreckin my life, anyone have any idea whats goin on?? If you guys have anyquestions email me or reply a post, and maybe someone can help mentor me through this.. there has to be something wrong or a way to get thru this. i wanna be a healthy person and live a normal life anxiety free without meds. i just dont know where to start, anyone with any ideas i would greatly appreciate the feedback. Thanks guys, and godbless