randomly keep passing out...?

Firstly, stop driving immediately! Until you know what it is and can control it you're putting your own life and those around you in serious danger behind the wheel.

Secondly, are you skipping meals? Some people who have low blood pressure (and dont know it) skip meals and their bp drops that low that they black and passout

You need to see a doctor, seriously, you could even have epilepsy or something where it could become shaking fits if you dont control it medically.

Just because you dont have health insurance, doesnt mean you neglect your health... not a good enough excuse, sorry

The thing about your question that should concern you, is you say it happens when you are driving. Have you ever thought of the consequences?

What would happen if you killed someone or yourself? Do you have insurance for that? I would rather you go to the doctor as opposed to the morgue.

You ask for advice here when you shold be asking someone with knowledge. Good luck.

It could be Vasovagal syncope its a rare disease but if it isnt it could be because of : Prolonged standing or upright sitting Standing up very quickly (Orthostatic hypotension) Stress directly related to trauma Stress P.O.T.S. (Postural Orthostatic Tachycardia Syndrome) Multiple chronic episodes are experienced daily by many patients diagnosed with this syndrome. Episodes are most commonly manifested upon standing up. Any painful or unpleasant stimuli, such as: Trauma (such as hitting one's funny bone) Watching or experiencing medical procedures (such as Venipuncture) High pressure on or around the chest area after heavy exercise Myocardial infarction, severe valvular (sic) disease, and disturbances in rhythm which reduce the output of blood may be responsible Severe menstrual cramps Arousal or stimulants, e.g. sex, tickling or adrenaline Sudden onset of extreme emotions Lack of sleep Dehydration Hunger Being exposed to high temperatures In health care, such as nursing care, digital rectal procedures (e.g., digital disimpaction) Random onsets due to nerve malfunctions Pressing upon certain places on the throat, sinuses, and eyes (also known as vagal reflex stimulation when performed clinically) Use of certain drugs that affect blood pressure, such as cocaine, alcohol, marijuana, inhalants and opiates The sight of blood or blood drawing Violent coughing Serotonin level / SSRI Swallowing (Less commonly) Low blood sugar

You need to tell a doctor. That is serious. You really need some help. My advice would be find a local walk-in clinic that is free/lowcost. Just look around in your area.

this could be caused by so many things that it would be hard to tell you what it's from. next time it happens, you should go to the emergency room. even though you don't have insurance, they can't refuse service to you. they'll have to help you.