B.W.
Hi J.! Well you must be exhausted and I do not have too much experience with this. My daughter is two and 1 month but I was just reading that most times it is a stress thing. I know you said that nothing has changed but I would continue to see if there is anything that is causing any stress in the day time. Also I have noticed that my daughter has phases and they usually last a couple of weeks and then they pass what ever the phase is. Good luck
B.