I Committed Blasphemy...What Now?

I was young(14)....I would blame him for everything, I remember I once told him that he sucks. I feel so bad and I became fearful of what is going to happen for me. I am now 18 and practically broke every commandment. I broke the second, third, forth, seventh, eight, and tenth. Not to mention I would watch and masturbate to it everyday, you name it I have looked at. I once even masturbated looking a my neighbors wife...I have cried many times over what I have done. I accepted Jesus as my savior, I know he died for us. I just hope he can have mercy on my soul. I have become fearful and paranoid about what maybe ahead for me. I just hope God can understand I was young, selfish, and arrogant, I didn't know him or understand him like I do now. I can't even imagine how much I have angered him. I used to think he turned his back on me, but I was the one who turn my back on him. As I am writing this I feel so bad and angry what I did when I was 14. I prey that he can have mercy on me. Should I confess blasphemy to a priest? I know that it's unforgivable and that really is what gets me freaked out. I am NOT proud of anything I have done, I will always have hope and faith that one day I hope I can walk with God in paradise....