Listening to a song, I've met one interesting sentence with indirect speech, but it's a song. An author can use whatever words he needs to get into rhyme, so I want to ask if this is right to write like in that case. There're two examples (the first one was in the song, the second one is that how I think would have been right):
So I said this is the worst day of my life.
So I said it was the worst day of my life.
As I believe, this is right to use one tense back (didn't know how to say it more appropriately, but I hope you understand what I meant) when we have something to do with an indirect speech, although there're always exceptions of any rule, and we have to work with context. I reckon the first example isn't that bad if we're speaking about the day that isn't over yet. However, anyone can be mistaken.
And, please, accept my apologies for my non-grammatical speech.