Stress!

I'm pregnant for my first time and oh so excited! I haven't gotten an ultrasound yet but according to my last period I'm 5 weeks and 3 days. I get anxiety from time to time due to stress at work. I can't always control where the stress comes from because someone always seems to be on my ass about production and stuff getting done (I work in retail). I bust my butt and get stuff done but because some of my coworkers don't pull their own weight it comes down on me too.

I need suggestions on how to manage my anxiety when it pops up since I can't take anything for it.

I'm terrified of having a miscarriage because of the stress when I'm at work. I've talked to some of my management and coworkers but it doesn't always help or change anything.