Rollercoaster

I wish I was not so easily discouraged or distracted.  It seems that these days it takes such a small thing to put me into a bummed out funk.  I have been asking God to give me eyes that see the bigger picture and understand where He is taking me on this journey.  Some days I am fine with not knowing  then other days I am frustrated, and yet other days it makes me sad.  I would not call myself a rollercoaster of emotions on a regular basis.  Normally, I am quite even keeled.  So, now I'm asking myself, what about this situation is causing the rollercoaster?  Why can't I seem to let it go and just wait for God's move?  That's the prayer, Lord, give me your patience to wait upon your good work.