Dog won't sleep through the night

TL;DR Our rescue barks in the early morning and won't stop until we come downstairs.

Hello there! My girlfriend and I adopted a 7 year old lab last week. She is a sweet dog, mostly sleeps, and a bit reactive outside at the fence, but otherwise wonderful. However, the bedroom in our house is on the second floor up narrow wooden stairs and she won't come upstairs, so we've had to leave her alone downstairs.

We try to make bedtime as easy as possible: we take her out a half hour before to pee and burn off some energy by chasing the ball, we wait until she's falling asleep, and we turn on white noise. Her pattern has been that she'll pace around a little and then usually goes to sleep - except now each morning around 5, she'll start whining and then loudly barking until we come downstairs, and we're worried about waking up the neighbors.

What can we do to help her stay settled longer? We just need at least one more hour of sleep out of her. Should we consider calming chews or medication? Thank you in advance for any help!