I blacked out twice. i felt hot and was sweatin my eye site went spotty and went to tunnel vision to black and had ringing in my ears. why is this?

Sounds like a faint: Your symptoms sound like fainting spells. There are many reasons for these: sudden shock, dehydration, standing up too long without moving, etc. There are some more serious reasons for fainting - like sudden blood loss, heart rhythm problems, and others. So see your doctor, and make sure that none of these apply to you. In most cases, your biggest risk with a simple faint is falling!