How much does she weigh? If she is under 2 lbs you may have to worry about her sugar. I have been fortunate not to have any of my pups have a problem with low sugar. Those who have will post advice if needed I am sure.
Quigley stays in a kennel when we are not home. When he was tiny and even now, the smallest kennel was too big for him. He would go to the back and pee. I blocked off the back of the kennel with rolled up towells so he would not be able to and he stopped pee-ing in his kennel.
He has enough room to stand up stretch and lay back down. It has been a lot of work with him but he is holding his bladder longer and longer. (Thank heavens!) I used to leave a bit of food in there when he was under 2 lbs just in case he needed to eat. Now he is on a eating schedule and doing quite well.
I chose the kennel method because I want him to potty outside. I did not want to confuse him by leaving him to pee on a pad when we were not there then requiring him to go outside when we were.
Everyone has a method that works best for them and their lifestyle.