Try to meditate....and do some visualizations where you are cool, calm & collected. Do you know yoga? Do some deep breathing exercises. Pray. Listen to a progressive relaxation podcast. Take a hot bath. Color with your daughters. Do these things as often as necessary.
You can do this WITHOUT freaking out. Just do the best you can and let the cards fall where they may. Practice acceptance. Don't get attached to the outcome. Stay in the present moment.