B.H.
Hello E.,
I can totally relate. We are just getting through the same issue. My daughter who turned 3 in June potty trained pretty early and very quickly at 2. In July I started watching a friends baby and the regression started. It started with wet spots that got bigger and bigger and then the poop accidents came as well. What has worked for us so far; First off, we tried not to make a big deal about it. Then we'd hand her some flushable wipes and clean clothes and tell her to go clean herself up. Intially we had to show her how. Also, to encourage her to actually make it to the potty, we started a sticker chart that earns an item from the treasure chest. The treasure chest contains small items that we find while we're out that she'll like. We started off with 6 stickers earns a prize so that it was possible to earn something in a single day. As she did better we increased the number needed. I think we are now at almost 2 weeks with no accidents. We've now transferred the tresure box to other areas that need improvement. All in all after trying several techniques, it lasted a little over 2 months.
The best of luck to you!
B.