Meaningless!

I started to read the book of Revelation for the past 2 nights using the Application Bible. I need some reassurance and solid foundation from the Word of God regarding life! Thinking and worrying all day all night doesn't do much help; I might as well read and understand more about it.
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I think I am showing signs of depression, seriously. I am getting increasingly cranky and moody. I dun feel like learning anything anymore, coz it will be futile eventually. I dun feel like doing anything anymore, coz it's of no use. Before I do anything, I will think: what good will it make if i do this? Life is just a temporal moment.. life can be gone in a flash and all our accomplishments/ trophies/ rewards will be useless. So why spend so much time doing things that aren't worthy of my time?
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The only thing worthy of my time is to spend time with God. Spend time with my Creator and spend time reading what He says in the Bible, because this world will pass away, but God's word will live forever.
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I live in this fallen world where man has chosen to sin. There is imperfection in this world, hence there are tragedies, misfortunes, accidents, disasters, catastrophes that are happening all over. There are uncertainties everywhere and I, as an imperfect human being, have no control over what's going to happen to me or my loved ones the next day. As a mother, i feel an enormous responsibility over the well-being of my child especially. I do my humanly best to take care of her, and now my problem is, I find it tough to let go and let God take control. Scary thoughts overwhelme me often and I cannot sleep.
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I wonder why people can make plans and look forward to fulfilling them, when they dun even know what's going to happen the next day. Steve Jobs is such a classic example. Regardless of how accomplished you are, how dignified you are, how successful you are, everyone faces the same ending - back to the box. It's a choice I have to make - to live my life to the fullest in the most meaningful & impactful way possible.
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Yes, everyone faces the same ending. The real difference comes after that - we can choose to face a 2nd death i.e. eternal separation from God or eternal joy with God. it's a real simple choice, and I have chosen the latter. And perhaps the most meaningful thing to do in this lifetime, is to help people see this real difference.