Girls... Hi. The daughter has been having trouble with her breast for …

Girls... Hi. The daughter has been having trouble with her breast for three days now. She plays with it, bites it, does everything but suckle well. For the last three days she's been struggling to fall asleep at night, only by 1 am we manage to put her to bed. Today is just... All day she's sleeping for 15-30 minutes, usually she slept for an hour and even two hours. I think that this could be a sleep regression started? She herself behaves well in principle, there are no temperatures, except that she's just a little capricious and that's all. What do you think it might be? We're four months away from our due