As a Muslimah I believe that whilst things of this world are according the divine decree of our Lord, He has still given us free will and the right to chose.
Personally most of what I do in my life is by my free will, though that said there are plenty times that things happen for which you honestly feel you have no control over. Be it good or bad, situations arise in life that you cannot prevent, but again how you then deal with them will be according to your free will.