Touchy subject

I’m currently 10 weeks pregnant and all my life have delt with depression and recently the past few years delt with anxiety as well. Well now it’s been getting a bit worse and I think I’m experiencing panic attacks. Sometimes out of no where the air gets so thick and it’s like I can’t get a deep enough breath. The only thing that helps is if I set outside into the cold air or stand by an open window. Is this anxiety and why would it be like this now?