D.T.
When I potty trained my now 3 year old, she was 2 at the time. Her Dr. told me to give her a "reward" everytime she used the potty, and celebrate like a "fool"! We used a sticker chart and left it in the potty! We started a "potty" dance everytime she used. There will be regressions, it's hard growing up. Both for you and for your child. My daughter took several weeks for the poo poo part, she is still every shy about it! She actally kicks me out of the bathroom to poo. If we are out, I turn around to give her privacy. I would ask her every 30-45 min if she had to potty. Someties, I would even just put her on the potty and read a short story! it takes awhile but in the end it's worth it! Patiene is definety a virtue in this situation.
Good luck!