Sounds like she is having a growth spurt...I would be offering as often & for as long as she wants to build up your supply...bf works on supply & demand & growth spurts happen often around 3 & 6 weeks & then again at 3 months...if you go by the "textbook' for my ds they happened at 10days, 4.5 weeks & 10 weeks, then 4 months. So this could be when your lo is having hers.