Postpartum anxiety

Have been really struggling with postpartum anxiety lately this is my first baby and I literally will not sleep at night just to watch him sleep he’s a month old and I’m driving myself crazy terrified of sids, I never know if I’m doing anything right, scared of over heating him or him being too cold,not being a good enough mom or honestly just screwing up in general. I think my biggest struggle is that there is a small human relying on me to keep him alive and I would just die if anything bad happened to him. Has anyone else experienced this? How did you get passed ppa or cope with it?