We had the same issue with Trixie the first few months she was home. She would wake at about 1 am and then around 5 am to potty. Her crate was in our bedroom and I would bring her downstairs to her xpen and she would potty on the peepad. Back in her crate, she used to sleep until around 7 am after her potty break, but if she came into our bed, she would sleep till I woke up.....hmmmmm.
Well, as she got a few months older, she didn't need her middle of the night potty time, but she would cry when I put her in her crate.
Okay, long story short....she now sleeps in our bed. But, I do get a better night's sleep and she goes to her potty pad by herself if she needs to now.
She trained me well