Hi there --
First, you need to get clear on just what's causing all this, and the sooner the better. I can't imagine putting up with all that for half a year! While it may be basically innocent (there are so many possible causes, including benign and malignant arrhythmias, other electrical problems, dysautonomia, even seizures) it could also be something more serious, and even a basically benign arrhythmia or other cause of fainting can be dangerous if you're driving or simply wind up hitting your head on something.
It does sound like you're having some sort of arrhythmia happen, and these can cause or be associated with fainting, which is something you just can have happening all the time. At best you'll wind up whacking your head on something, but it could be even more dangerous than that. You need to be seen by a cardiologist and soon, and preferably by an electrophysiologist (cardiolgist who specializes in arrhythmias). Many arrhythmias are very easy to manage or even eliminate, but they first have to be diagnosed. First thing you need to have is a 12-lead EKG, and if that doesn't reveal anything, then an echocardiogram (neither is invasive nor takes much time), and then perhaps wear an event monitor for a few weeks to try and catch this activity, whatever it is. And please, next time this happens, get yourself to the nearest emergency room, as they may be able to catch what is going on and document it. This is a very important part of getting this resolved. There are several electrical problems of the heart that become common in adolescence and some of them are more serious than others, but anything that causes repeated fainting is serious until we know otherwise.
I hope this helps. Please do follow up with us here as needed, follow up also with a cardiologist, do not hesitate to go to the ER if this happens even one more time, and please keep us updated as well. Again, it may be something very innocent, but we don't know that, so til we do we will treat this as potentially serious. Okay? Now stay in touch with us here and I hope to hear from you soon. Good luck to you.
John Kenyon, EMT, CCT
Non-invasive cardiology tech, Emergency and Critical Care technician, Critical Incident Stress Mgmt. specialist