Fainting/dizziness??

I am 14 weeks and since the beginning I've had dizziness. Well, during Mass today, I had to run out of the pew, and virtually trampled the couple beside us, as I got the sweats, and my eyesight started going blurry. I knew I was going to pass out and didnt want to do it in front of everyone. I ran to the door and I got a few minutes of fresh air and felt slightly better, but today has been a bad dizzy day. I had bloodwork done and all is normal. Normal blood sugar, blood pressure and iron levels. Anyone else have this? This pregnancy has been ROUGH so far, between the constant nausea and morning sickness, plus indigestion problems and dizziness. I'm a home school mom with three boys and these past 14 weeks have been really trying. (Maybe it's a girl this time Haha)

Edited to add that I mainly feel dizzy and lightheaded after I eat, but it comes and goes during the day, even after not eating for a couple hours.