So my baby girl is 5 weeks old. And she's been doing good sleeping 5 hour stretches every night. Waking 2 times to feed.…

So my baby girl is 5 weeks old. And she's been doing good sleeping 5 hour stretches every night. Waking 2 times to feed. These past few nights have been different. The first two nights she finally went to sleep at 3am and last night she was up all night. I made sure she was changed, dimmed the lights, her tummy was full, I tried the pacifier, burping her, the swing, and swaddling. Nothing was working. She became over tired and finally at 7am I put her to breast and she fell out. I think maybe she's going through another growth spurt. All this just came out the blue. Is this normal? Will she ever go back to her schedule?