Losing my mind

I have a 2 month old son and I try my hardest to make sure he is happy and safe. Lately, I feel like all I see on social media is an abundance of posts about SIDS, children falling and dying, suffocating in cars and cribs, and other their horrible instances. Is postpartum anxiety a thing? Is my son really at risk for dying as much as social media portrays infants to be so at risk? Is this just hyper anxiety talking? I feel like I'm constantly overwhelmed with the thought that my child is going to get hurt or even worse. I feel like I'm losing my mind and that I'm always on high alert. Any advice or reassurance would be greatly appreciated, thanks ladies.