Hi there, fellow Long Islander
Unfortunatly, she is taking some steps back, as they ALL do at her age.
You must start at square one again with the training, but hopefully she will get back on track fast. The part about her being contained when no one is home is GREAT! But when you are home, you must also not let her had free acces to everything, until she is back on track. Also, maybe a really good potty treat only given for good potty is a good idead.
This happened to Roxy and TJ too. I had to block off the rest of the house when I was in the kitchen, I kept them in there with me. Then when watching TV, I made sure they didn't go to far. It didn't take too long at least 10 days to get them back on the pee pad training.
They had freedom when they were 1.5 years old.
Best fo Luck!