Where is my inspiration?

For weeks I had not been inspired to write anything lately; I hate it when I go through these dry spells.  I always thought that writing was my passion for a reason.  There is still some doubt in the back of my mind, whether or not writing is my true calling.  I want to be successful at writing more than anything, but I always seem to fall short of the sucess I desire.  I just want to feel accomplished at something.