Postpartum depression adoptive parent

Is it possible to get ppd if you're an adoptive parent. I really don't understand what's wrong with me. Me and my husband have wanted a baby for years. We adopted a beautiful little girl. But I'm crying everyday and I just feel so hopeless. Like I'm the world's worst mother. I haven't felt the bond I thought I would. And I've wanted this for so long. I feel so depressed and like nothing will get better.... Idk what to do...