Odd symptoms

Ok I'm going to post this on a few different forums because I'm not sure which way to go on this:

I've been having issues with blood pressure fluctuations, lightheaded spells and losing my vision for ~10 seconds everything goes back, then I'm lightheaded for a minute or two and it leaves as quick as it came.

After eating (sometimes while eating too) I'm sweating (whether I'm cold or hot) in the face and my hair and neck.  The spells where I get lightheaded, sweat and black out can happen at any given time.  These have been happening daily now for about a week and 3-4 times a day where everything goes black and the waves of lightheadedness is really making me angry.

I have an appointment with an OBGYN concerning issues with cysts in two weeks.  I questioned "hormonal" issues.  I'm also questioning  "thyroid" (though my numbers I think are pretty good, I'm always cold and my hair is thinning out again),  type ll diabetes (maybe dropping to low at times, but maybe that's reaching for straws) or "heart" issues (due to BP fluctuations and palpitations/pains, sweating, headaches or heartburn lately.  Urggg.

I've been forcing myself to eat every 2-3 hours and have been drinking a lot of water, just in case it could be sugar related even though my numbers seem to be between 70-120 or so.   I don't think they're bad enough to be causing this because a lot of times it's around 100.

I'm honestly worried about telling her about the black out spells to in fear of loosing my drivers license.  Anything to ask my doctor about would be appreciated.  
Thank you in advance.