Nursing trouble

Rebecca • Proud mommy to Lily, August 2015. Expecting #2 due December 2020.
My LO has been a nursing champ since we came home from the hospital. She's almost 12 weeks old and I don't go back to work until next month so am free to nurse on demand. The last few days she will nurse great at night but otherwise she latches on and pulls right off again and again all the while screaming she is hungry. I have tried multiple positions to deal with possible fast flow and sat in the dark to help with possible distractions. If I pump and put it in a bottle she eats...and she hasn't had bottles other than the rare exception. Anyone else dealt with this or have advice?