I think this is it - any advice on staying calm?!

I think this is it, I'm 41w2d and am having contractions about 7 minutes apart now. I think I'm also losing pieces of my mucus plug every time I go to the bathroom. I'm trying to wait for them to be 5 minutes apart before heading to the hospital and am trying to let my hubby sleep. Any advice on keeping my cool these next few hours????? If anyone else out there is in labor with me much love to you and our babies!