Potty Training Frustration

We started Potty Training at the beginning of February and the first week and a half went great. Our little one was telling us when she needed to use the bathroom and we were having 0 to 1 accidents a day. Then something happened.... the last week and half have been confusing. When we are out Little Girl does well and ells us when she needs to go. But, it's a different story at home and we are having lots of accidents. We are getting very frustrated and a thinking about tweaking our approach. Any ideas?