anxiety went away during pregnancy?

so i have really bad anxiety & panic attacks but when i got pregnant it all went away??? i literally don’t understand! i’m happy about it but i don’t understand why, im assuming it’s the hormones but i wanna see if anyone else went through this. before I found out I was pregnant and when I thought I was pregnant, I was having severe panic attacks about dying during labor and a bunch of other stuff but now that I’m actually pregnant I feel way more calm down. It’s so strange. I’ve been fighting constant panic attacks for about five months now & now it’s all just gone. i do overthink a little about my babies health etc but it’s no where near as bad as the panic attacks i’ve been going through.