Postpartum Blues or something else...?

Ok...this will be a longer post so I apologize in advance...I don't even know where to begin. So: I have a healthy one month old daughter but ever since she was born I'm having trouble feeling that bond/connection with her. I'm at home alone during the day and when she gets to crying and being fussy I feel Soo overwhelmed and sad. I love her to death but it makes me second guess my decision to be a mother, I just don't feel prepared for all emotions I'm dealing with right now...my fiance tries to understand what I'm going through but I don't think he truly can as he is a positive and happy person naturally. I just want to feel like the old me again. I don't feel happy anymore I just feel like I'm going through the motions every day and not bonding with her. I had depression/anxiety issues before getting pregnant and i knew there was a chance of having postpartum depression also after birth but this just feels like complete disconnect and I hate it. Has any one else dealt with something similar?? Am I just a terrible human being who shouldn't reproduce?? Helppp