Postpartum depression and anxiety

Hello, this is totally out of my comfort zone to be on such an open forum discussing my struggles but I am struggling and don’t know what to do. My baby is 4 months old now and I still go through these extreme lows of feeling like I’m failing him, like I have no idea what I am doing, or I should have never had him in the first place. He begins to cry and my anxiety spikes so high to the point that I make myself sick and in return I can’t comfort my son. I have spoke to my dr, been put on medication. And I still feel the struggle very intensely most days. I guess I’m just looking for other moms with similar issues or any advise on how to get through this mental battle.