Need Facebook message help please

I composed a message and hit “enter” but it just sits there – no “message sent” indication, no check mark. Can anyone tell me what I’m missing here? Possibly related, while composing the message I hit “shift” and “enter” to make a paragraph break, but it didn’t work. I’m at a loss to understand this.

Problem sorta solved. Went to my friends list, clicked on recipient, clicked on message, wrote and sent one normally. Don’t know why it didn’t work when I started the process by clicking on “message.”