I think my behaviour has become abnormal

I have become extremely moody . I don't know I behave so violent at times and I have trouble sleeping . I have so many thoughts running through my mind . Whenever I am trying to get sleep something keeps bothering me . Bad memories from past keep flashing . I keep avoiding them. .i am too scared to face them again. I have got this weird urge of always keeping things clean . I am obsessed with cleanliness.this is not normal . I get furious if I see a mark on mirror .i myself find it weird sometimes.i have severe headache at times . Sometimes I am emotional and sometimes I am over enthusiastic.i keep crying blaming god for everything.i have trouble concerntrating in studies . Everything is so messed up . I really need some help.i have gained weight over an year because of pcod and I feel like I am worthy of nothing . This is one of the reasons of my frustration I guess