Hugs and prayers to you, G.!
Yes, every pregnancy is different and we also do this differently as we (yikes!) get older. And, though you may not have felt like this during other pregnancies, I was basically feeling at least a little "green" the entire time that I was pregnant with both of my children. I was 33 when I was pregnant with my first.
I did a Google search and typed in "pregnancy" and a bunch of things appeared in the drop-down box. The first one was "pregnancy dizzy after eating." Many sites came up with helpful suggestions. Small meals. Drink lots to avoid dehydration. Slow down and take it easy.
Lastly, have you heard of Mom of Pre-Schoolers? (MOPS) I only have two children, but I would not be where I am today without the love and support of loving husband and my MOPS group. They are a Christian-based group of moms that exist to support other moms. If you haven't, it is definitely worth looking them up at www.mops.org
I do hope that you can take it easy and feel better!
D.