I'm 4o+1 today and just lost my mucous plug, too! Hurray for us!
Good for you wanting to keep your fluids high for the AFI...most momma's don't know how important it is. A low AFI could lead to unnecessary interventions...when all you needed was something to drink.
Feeling flu-like symptoms CAN be normal for some moms in labor. We often hear about the "other end" unleashing before labor (hence the reason castor oil is used as an induction method sometimes) But i have had plenty of momma's who spend some portion or other of their labors vomiting. (I happen to be a transition vomiter! Fun! nothing like a double peaked ctx and vomiting at the same time
Now, that being said, sometimes H2O can be a bit much on a squished, full-o-baby, tummy...you've only got so much room in there! Try something with some nutrition in it...some OJ, a smoothie, etc... to get your electrolytes balanced.
Justine--Wife to Sir Hubby, HBAC Momma to 5 kiddos including Lazlo born 1/6/10 gently at home!
I threw up several times about 12 hours before my labor began. I thought I came down with the stomach bug my DH and DS had a few days before, but when the baby arrived we realized it was a prelabor sign.