I read a lot of posts from cat owners (usually new cat owners) who are all worked up because their cat is "crying". Or they're getting up at night, or they're feeding extra food because their cat is "crying". Let's face it...a lot of the sounds a cat makes sound to human ears like crying, simply because our brains are programmed to interpret sounds like that as a human child in distress.
But the cat is not necessarily in distress when it makes those sounds. It's more important to decipher the cat's behavior, and its "body language" to determine if it's in distress. And that takes getting to know your cat. The only way to tell if the sounds it makes are the sounds of a cat in distress is if they are sounds that cat does not normally make.
Rocket is a VERY talkative cat, and right now he's walking around the house with his tail in the air, a happy, healthy cat, making sounds that, if you were standing outside my window (well, in the summer anyway, not now...the window's closed), you would SWEAR I was torturing my cat. I certainly am not!! That's just the way he is. I don't know why he talks so much more than my other cats, but he does, and a lot of his talk sounds pretty distressing, if you didn't know him.
Don't assume there's something wrong with your cat just because you think he/she is crying! What is the cat DOING?
Thanks for putting up with my little rant...