Thanks for writing in
It looks like you had some dehydration
with low glucose
levels. This could have been made worse by the hot weather. I would want you to get your glucose levels checked once to make sure we're not missing anything like diabetes
( low glucose levels)
For such a situation in the future, we would want you to carry some biscuits, candy and juice at all times. Also, oral rehydration solutions like Gatorade would be very well suited for this purpose.