Natural antidepressants

Ts
I'm about a week post partum, and the blues hit me like a brick wall! I find myself crying for no reason. I even cried while eating a Haagen daas bar, and that NEVER happens! I don't feel like me, and I would like to know if anyone has tried any safe supplements or natural antidepressants. I'm breast feeding my baby, so I'm being careful about what I eat.