Depression

Iv suffered from depression and anxiety in the past just wondering what effect it has on the baby? Im no longer taking medication and was fine for a while but the past few weeks its come back and full force i don't want to take medication as baby will be getting it also so iv been trying to defuse oils and stuff more natural.. Should i tell my midwife ? I find myself crying exessivly for hours sometimes and feel so lost and alone. 
Anyone experianced this or going through the same thing ? I don't have many friends anymore so feel like this is the only place to ask..