Night diaper issues again

So we went a while with having no issues, then 4 nights ago they started again. The first two nights, she had peed through her diaper again and her front was wet and we had to change all the sheets. Then the next night, she woke up at 4:30 and Mike changed her diaper and she went back to sleep. She wasn't we at all in the morning. Then last night, she woke up at 2:30am soaked and Mike had to change her diaper and her outfit then she went back to sleep pretty easily. Not sure what to do anymore ... :/