How to quell the anxiety?

Rachel • Mom of 1
I am now 4w2d pregnant after a miscarriage last spring. I'd heard the heartbeat at 8 weeks and miscarried around 11. Sunk into depression over the summer, just coming out of it this past month.
I'm finding myself feeling really superstitious this pregnancy and striking bargains along the lines of "if I do everything exactly right this pregnancy will be different." I read somewhere that optimism is helpful for pregnant women. How do you all cope with the doubt and the fear? I am dreading the thought of another loss. Your advice is much appreciated!