Why me??

I never knew how bad i wanted another child until i found out i was 5 weeks and 3 days pregnant. Four days later i miscarried. Now I’m hurt, angry, confused, amongst other things. I find myself crying for no reason. I feel like a piece of me is gone and I’ll never be the same again. My 2 girls were from a previous relationship, the guy I’m with now has no children. I gave him hope that he would be a father and i took it away. I’m going insane blaming myself. When will i stop hating myself and return back to the old me??