OMG I feel your pain. when my girlfriend and I first got Chelsea it was the same way....yelping, yelping, yelping....she would not stop barking at night. and for a little thing her barks were loud. I ignored her too in the beginning, but that did not help, she would bark nonstop for hours on end. And yes she too would sleep during the day
It got so bad with the lack of sleep issue that one morning I woke up, went into the kitchen and totally blacked out. i mean one minute I was up and the other i was on the kitchen floor with water dripping all over me from a plant i had knocked down on the way down. The lack of sleep from Chelsea's barking had taken a dangerous toll on my well being.
So now several months later...has the barking stopped...yup, but that's only because she now sleeps in the bed with me. So no this may not be the best solution, but it's working for me. I'm getting my sleep and she's not barking all night.