Hard days

Last week were hard days. Last week was a shit and don't wanna talk about it anymore.
Last week, i mean, this one is getting bad is getting shitty. Last week made me remind some past things that let me sad, but just a little bit.
And im just wondering why do i need to pass somethings through? am? Why i got the feeling like if something in my life were wrong and why and how im gonna get over that?
Why things are so difficult? Why some people have an easier life? What did i do wrong? Hows gonna be on the future? This bad luck is gonna come with me my entire existence? What shall i do with all this? What shall i do to change my luck and starting appreciating how lucky i am for having such a wonderful life? What do i have to do to forget all that happened?
Answers are totally welcome.