Postpartum anxiety.

Anyone else dealing with this? I panic over irrational situations, feel like my LO is gonna get sick and die constantly. Like today I was blowing on his neck rolls to dry and I got scared that I blew saliva in his mouth and now he'll get hsv 1, and I don't even have a cold sore. How can you control these invasive thoughts?? I don't want to get on medication.