For the last 2 days I have had coming and going chest pain only on my left side. When it happens its all of a sudden and a stabbing pain that worsens when I breathe. And gets worse evrytime it happens. The last time was about 10minutes ago and this time my toes got tingly amd I and I've been dizzy feeling. Im only 21.

So.. the thought of seeing a doctor at the ER about something like this. didn't enter your mind why? Personally I wouldn't hesitate... better to be told by the doctor its nothing of importance after an examination and tests .. than to be found dead by someone close to you.

Yes things CAN happen to you even though you are young. Nobody is invincible or immortal.

Chest pain may also be caused by problems in your lungs, esophagus, muscles, ribs, or nerves, for example. Some of these conditions are serious and life threatening. Others are not. If you have unexplained chest pain, the only way to confirm its cause is to have a doctor evaluate you.

You may feel chest pain anywhere from your neck to your upper abdomen. Depending on its cause, chest pain may be:
Sharp, Dull, Burning, Aching, Stabbing, A tight, squeezing, or crushing sensation

You need to see the doctor.. it can be a dangerous issue