I.M.
Hi K.,
I also have a 3yr old that just finished potty training. She will still have a few accidents at night. One thing that worked for her was to wake her up in the morning,not wait until she woke up on her own. That's when we have the most trouble. She would lay in bed half awake and wet herself before she was all the way awake.SO maybe try waking her 5-10 min early to see if that helps.
A little about me:
SAHM of 2 girls 6 and 3, with #3 due late Aug.