Whenever I read a sentence with a period in my head, I read it in a very flat tone, since the period explicitly excludes any exclamation point, question mark, e

Whenever I read a sentence with a period in my head, I read it in a very flat tone, since the period explicitly excludes any exclamation point, question mark, emoji, etc. So that makes it sound weird when someone uses a period in casual conversation, because if I was talking to them on person they would usually have some kind of emotion. For example, I would read "Sounds good" in a generally positive way just like when someone is saying that in person, but when I read "Sounds good." I read it without any emotion in my head which sounds wierd.