I know exactly how you're feeling. Max is 4 months old, so younger than your baby, but he's been doing soooo good the last couple of weeks. We went back and forth with the crate training but have been using it religiously the last two weeks. He hasn't had the first accident in it (we were having problems with that before) and stays the night in it, though I do let him out at least once during the night. Just one accident in the house is all in the last week and a half and he seems to have gotten in to a potty routine. (Poop in the morning first thing and poop after lunch) Today it seems all that is out the window. Sometime between when I let him out last night and this morning when he normally goes out he pooped in his crate. Then later this morning after going outside for a bit, he comes inside and poops on the carpet. It makes you feel like you're starting clear back at step one and that there is no end in sight. You wonder is he/she having an "off" day and will things be back to good tomorrow, or has all my hard work just been erased?!
I was keeping Max in a play pen with pee-pads at first when I couldn't watch him but I decided this probably wasn't the best approach. He needs to understand that he can't potty anywhere in the house and I think it's to confusing for him to let him potty on a pad in the house, but no where else, and expect that he also learns to go outside. So we've done away with the pads and playpen and are just using the crate. I've seen several members here post a good idea. When the dog seems to regress in their potty training, take away their freedom and restrict them back to a small area of the house. As they improve again they can be allowed room to roam in more areas of the house.
On days like this I just take a deep breath (after the clean up, don't want to breath deeply then!
) and remind myself that this surely can't last forever. It seems that this breed is extra hard to house train and I'm not sure why that is. Unfortunately I didn't research enough BEFORE getting a puppy, or I might have picked an easier breed. Hindsight is 20/20 though and I love my little Max now so I just have to deal with it and keeping pluggin' along! Good luck with your little girl!