I need help....

I was fine when she was first born but now my daughter is four weeks and I'm starting a new war with post partum depression. I can literally feel myself detaching from my little girl and it bothers me but I can't figure out how to fix it. I feel like my head is against me... she might have colic and her crying makes my anxiety so bad I have to walk out (I never leave her alone always with her dad or my mom) but... I want to fix this and I'm not sure how so if anyone knows a good way to do this let me know. I would like to find a support group or something... I can't take meds cause I'm breast feeding... that's the only time I feel bonded with her right now I don't know what to do... this is my first child.