Nutritional Vitamin Supplements

I was at the gym earlier tonight when a pretty scary thing happened. Today was chest day and I had just finished so I decided to do some cardiovascular exercise. I was already kind of tired but I decided to suck it up and keep going. I ran/sprinted non stop on the treadmill for about 15 minutes until I felt like I was going to pass out. It worried me because I had been doing this same cardio routine for the past two weeks and I hadn’t felt this bad yet. I got off the treadmill waked around for 5 minutes trying to get my breath but I just couldn’t. I left the gym, waked to my car and when I got in all of a sudden BOTH of my arms began to tingle and then went full on pins and needles. I knew something was wrong so I waked back in the gym and asked one of the women that worked there if my lips were blue (or something like that). She then made this shocked face as soon as she saw mine and got scared. She and this other lady panicked and told me that my face was a greenish blueish white. This is when things got hazy but I’ll try to remember. One of the women luckily was a physiotherapist who had paramedical experience (If I remember correctly). She told me to sit down, asked me the standard questions and took my pulse. I think it was something like 110-120 bpm (this is now 10 minutes after I have stopped all exercise), my breathing was rapid and I tried so hard to take deep breaths, but it was either breathing deeply and feeling like blacking out, or breathing rapidly and having the problems associated with an extremely high heart rate. After what felt like a lifetime, I and the staff decided to call an ambulance. They showed up asked me how I felt, if I had any pre existing medical conditions, if I ate today etc etc then took my blood pressure and heart rate. I remember the blood pressure in my arm being something ridiculous high. They talked me through it and asked if I wanted to get in the ambulance and go to the hospital. I said I’ll wait it out figuring I wouldn’t die because I had already lasted 20 minutes or so. I sat up slowly, filled in some paper work (NO FREE CHEYAEAH!) and had the worst head rush that I ever had. I decided that I didn’t need an ambulance and they left. One of the staff drove me and my car home. I’ve been home no for about 2 hours and I am extremely tired. I wasn’t really worried until I jogged up my stairs and it felt like I had just ran the 100 meter dash. My heart rate went up to about 100 bpm and stayed that way for a while. I’m about to go to bed now but I just thought I asked if this sounded familiar to anyone? Here’s what really worries me… I’m an 19 year old male. I’m 6′3", 165/170lbs and eat like every other guy my age. I’m lean and have been working out for almost 3 years now, mainly muscular endurance, little hypertrophy and cardio. I do not have any serious conditions (that I’m aware of) BUT I did go to the doctors a little over a year ago for something similar to this, although it was no where near as serious. Just long lasting palpitations, breathing difficulty, arm pain off and on usually when exercising. Had a 24 hour holter monitor test and EKG, all negative. It went away so I figured it was perhaps stress related. Tonight although was something totally different and I’m not sure whether or not I should get this checked out. (I don’t want to sound like the boy who cried wolf). I’m not stressed, I ate well today but I had only 5 hours of sleep last night. Does this sound like overexerting my body or something more serious? thanks