Do flies scream

I swatted a fly with my hand and it stunned it. I went to pick it up and it made a noise that sounded like a high pitched shreek. I was amazed and felt pretty bad. i won't be killing any more flies. That crazy experience made me realize even though they are gross and annoying, they are living creatures and feel pain. Who am I to kill it for just trying to live, it didn't ask to be here just like us!