Just did something not so great for my career - but Im cranky.. is that an excuse

Formerly Mrs D S

So I had a 1:1 lunch today with a woman who has had an extremely successful career while raising 3 kids.  She offered to have lunch with me to discuss my plans, my aspirations etc.  I was gung ho.. until I got to today. I don't feel like talking to anyone, Im kind of cranky and I don't think I can fake smile for even 2 minutes.  I cancelled the lunch and tried to move it to a 30 min meeting - to which she still hasn't responded.  Probably a real bad move, but UGH!