My 7 week old just stopped latching

I've been breastfeeding since day 1 and she will be 7 weeks tomorrow and out of no where last night she just stopped latching she was screaming for 30 mins with me trying to get her to latch so werid she usually a champ. Left breast or right breast she won't latch. Any position she won't latch I had to get some frozen breast milk to get her to eat in bottle. Anyone else ? Is this just a phase ?