When people put "..." at the end of a sentence, does that mean something's wrong?

Typically its used to draw out a sentence, to signal that theres more to the thought that they dont feel like writing or sometimes people will send just the dots to signal silence, I do that when someone sends me a message but I have nothing to say, I dont have to reply and they will still know that I read it.

no, i use it whenever im too lazy to complete my…

It honestly depends on the situation and what you two are talking about, personally I use it when somethings wrong so it all depends.

it means they were left speechless or don’t know what to say.

It is called points of ellipsis. It indicates that something was left out. It can be used at the beginning, between or at the end of content. It is frequently used to shorten long quotes but it is bad form to use ellipsis to change the meaning (though this happens frequently intentionally or not). Also used in mathematics to indicate that a pattern repeats.

i always do that. and no it doesn’t mean that something’s wrong. it means that you are either addicted to dots like me!!! or you are starting a new set of sentences or a new peragraph but not exactly a new paragraph…if that makes sense…lol…see i keep doing it dont i?

or if you like are confused or ramble on or something like i always do lol =D

to me it means they dont know what to say or dont know what they should talk about next and want you to say it