Sometimes when I'm writing it can be very hard to make decisions. I want to walk away, go do laundry...almost anything except decide what this character would do now or where to go with a scene. My stomach and jaw clench. Then I remember to breathe.
Sometimes I take a break and find I can get back to the work and have or find a solution. Sometimes I just have to push on through (without too much force, which doesn't help anything) and make the decision. I can always change my mind.
Writing is re-writing. Thank goodness for that.