stress/anxiety/panic attacks

Hey mamas-
So this might be stupid, but I'm getting more stressed about stress. I've been pretty stressed lately and I have panic attacks pretty often, and I'm worried that this is harming my baby. 
This is my first pregnancy,  (I have a daughter but she isn't biological) so I'm probably just overreacting 😞 
I can make myself calm down pretty quickly after a panic attack usually, but then I worry after because I'm afraid the anxiety/stress is going to cause a miscarriage. 
I feel like this is a stupid worry, but I don't know? 
xxx