When i text somebody and they don't answer right away, i don't freak.
But when it's been all day, i start jumping to conclusions.
Some are stereotypical like "Am i annoying them?" or "Does he feel weird talking to me now that he knows i like him?"
But others are more serious like "What if they got in a car accident? Or had a heart attack or something??"
Because it is entirely possible that they're not answering because they're dead!
The next day:
"Hey, sorry i didn't text you back. My phone died."
But by that point i'm too relieved that they're alive to feel stupid haha