Hello ladies .. it’s Husband related doubt ..

Anyone’s partner acts like weared .. my Husband is having mood swings .. suddenly become dull n saying like headach r something n becoming calm n just behaves like unknown person .. I don’t know why he behaves so.. if I ask am done anything y got headache n mood off. He says nothing .. it’s kind of mental torchure to me .. I already feeling Low n with his behaviour I don’t know what to say .. I don’t hv any one to share I just feeling alone .. pls help what to do in this situation