For instance, say that I got pregnant (I am 47). I have a choice - a dilemma if you will. I don't WANT another child, for one thing. It's a health risk as well. I can choose to maintain the pregnancy, or I can choose to abort the pregnancy.
In this case, I have to put MY will aside and obey what I believe is God's will. I should have faith that when I obey, God's will will be accomplished through my obedience. I have to submit my will to God's will and pray for wisdom, strength, and courage.
Now - did I just obey, or did God predestine this child, this life, regardless of how long or short it is? Did God know, before I was born, whether or not I would keep this pregnancy?
See what I mean - this is an example of the mix of free will and predestination.