Contentment Is hard To Come By

It seems like I'll finally get to a point where I feel content and that I am happy where God has me when all of the sudden my world is shaken up and I'm back at the beginning again. And it's dumb. I then spend a lot of my time worrying and wondering what's wrong with me. It all turns inward, which is where my focus shouldn't be , it should be on the plans that God has for me, and how I can further serve Him. So obviously I know what I'm supposed to be doing but why can't I just give up this uncontentment and live right? Well if I knew the answer to that I wouldn't be writing this blog. So if you happen to read this and have an answer for me please tell me!