It should just be a phase, probably a growth spurt! Could even be discomfort from teething! Just give it lots of patience and keep offering the breast, taking a break, offering it again...as long as she still is peeing like normal, usually 5 to 6 times or more a day, she should be fine. It's very rare for babies to actually self wean before 1 year of age, so try not to panic too much and give her some time to calm down lol