I am not suggesting you give her a list of things and say this might be what is wrong and work on this to fix your innards and that will make all our problems go away.
I am saying she could be experiencing some very real physical and emotional issues pertaining to 'female stuff' that you are putting under the MLC umbrella. Hormones can be treated. There is no prescription to fix MLC.
Also FWIW IMO, a 180 of pecking her on the cheek is not a good 180. Having her coffee ready for her is.
Live your life while you are still living. Riding the trail less traveled.