I wrote a song called....?

"Nothings gonna change my world". I didnt even know they were lyrics to a Beatles song until i Googled it afterwards. I had those words stuck in my head and i thought i made them up.... would that be considered stealing, even if my song sounded nothing like The Beatles song? Because they're famous lyrics apparently.... i hadnt heard that song before. Or actually i heard it once when a group of musicians were singing it recently at an awards show. But i forgot about it

Why Johnny Payne?

It's a very famous line in a very famous song, people might think you're making an allusion to the Beatles. I don't know the legality issues behind it, but I'm sure lines have been reused song after song in the past, and "nothing's gonna change my world" isn't something totally odd and unique as say... "Yesterday I woke up sucking on lemons....." (Radiohead)

just a little tip putting a song title on the internet is a bad idea

It doesn't matter unless it sounds the same as the other song. If it's just that one line, no big deal.

Lots of songs have the same or similar lyrics but sound nothing alike. Happens all the time.

Be Careful about posting it anywhere else because if you record it, it may be in violation of copyright policy