I feel like this whenever I'm within my first week of sobriety -- usually the first 2-3 days. I so badly don't want my peace disturbed. I'm so on edge, that even when I'm feeling a moment's peace or joy, I have to be gentle with myself and realize it will be fleeting and temporal until I've spent more time sober. We're not rock solid, and we have to realize that. We're vulnerable and edgy. Just have to be patient with ourselves. Moods are tricky when you're making any kind of lifestyle change.
I am so glad to hear someone is on day 6! Keep going! I'm on day 2, and today was just awful. I'm hopeful, though. Take care!