Help plz

Since yesterday morning I have felt out of it. Like I have 0 energy, not a big appetite, dizzy or light headed feeling, and was seeing spots last night. Both my sugar and BP are good. Having some cramps a bit. Going to doctor TMR for 37 week check up and ultrasound to check fluid. What do you ladies think could be going on? My husband and I are at a loss!?

Update!!

I went to the doctor today and he pulled me out of work, he said it could just be that I am feeling crappy at the end of my pregnancy, or a type of vertigo. My daughter is now going to be here on Jan 30th via repeat c-section. Ultrasound showed that she was about 7 pounds and her fluid looks good and she is practicing her breathing(: