Absolutely nothing to worry about unless your song is generating substantial income. Absolutely nothing.

Think about it....why would I go to the expense of suing you for infringement unless there's royalties to be claimed? A copyright infringement case costs a minimum of $20k to litigate. Why would I spend that money unless there was a heck of a lot more on the table to be gained?

99.9% of the infringement cases are brought by people who wrote songs that are generating little to no income, suing people who have a big hit. No one in their right mind is going to sue someone for a similar sounding song on an independent project, or even an album cut on most major artists. It's simply not worth the time & hassle, when all you'll accomplish is proving a point.

http://www.rogerbrownsongs.com
http://www.nashvillesongwriters.com/roger-brown