I feel sick is the sixteenth of thirty-eight cinematics shown in The Last of Us. It is approximately forty-two seconds long in length. Below is the complete transcription for this cutscene's spoken dialogue.
Note that the dialogue is copied from the subtitles.
Ellie: Man... [lowers handgun.] I shot the hell outta that guy, huh?
Joel: [Stands up.] Yeah, you sure did.
Ellie: [Sits on nearby crate.] I feel sick.
Joel: [Snatches handgun.] Why didn't you just hang back like I told you to? [Walks off, unloading then reloading the gun.]
Ellie: [Looks at Joel.] Well, you're glad I didn't, right?
Joel: [Chuckles.] I'm glad I didn't get my head blown off by a goddamn kid.
Ellie: [Stands up quickly.] You know what? No! How about "Hey Ellie, I know it wasn't easy, but it was either him or me. Thanks for saving my ass!" You got anything like that for me, Joel?!
Joel: [Pauses.] We gotta get going. [Walks off.]
Ellie: Lead the way...