You had to make a tough decision, and with the daughter, probably made the right one.  

I've recently discovered a pattern...on the first or second day of trips I often have had headaches and some feeling of nausea.  I've concluded I am suffering from dehydration.  The excitement of the trip, the intitial flurry of activity getting ready and launching...all cause me to forget to drink.  After reading my past journals I discovered the trend, and now plan to drink at least two liters of water the first day.  
I'm told dehydration can easily occur during wet cold days...you don't feel like drinking even though you should and you continue to lose fluids.  So, my suggestion: consider forcing yourself to drink lots of water and see how things go in the future.  

Other symptoms of dehydration: fast heart beat and dizziness.  

I've learned it's one of the most common causes of ailments in the bush.

For what it's worth...

prouboy