You are not a wimp...you learned something about yourself is all. Wipe your tears and carry on. I thought I was strong too until I was faced with the same challange. I am getting much better dealing with situations but it has taken me TIME.
Drink lots of extra water and go for a good brisk walk.
I am sorry you feel so bad. One of the downfalls of falling off the lowcarb rules is "feeling" it the next day. I hope you feel better soon.

cin