Hey Axel, I had the same problem too and also thought the same way you did also. Truth is, nothing is original no matter what you do, someone before you has already done it. Especially if your using common chords like E, A, D, and G. There is an almost infinite number of songs with those chords mixed in them. About having any problems with people saying you copied it; as long as you don't copy the entire song there's no worry. Just have fun writting stuff, and don't be too critical on yourself. If you wanna be alittle more original, try different tunings on the guitar and play the same thing. I do that occasionally cause I find I come up with some neat stuff. Just don't kill yourself because your songs have the same chords as another. :D Have fun!