Why Does Texting Feel Different From Talking?

Have you ever stressed out about sending an email, rereading it to see if it sounds okay, or wondering if you added too many exclamation points? Or maybe you feel confident when expressing yourself via text message, but you just can't seem to find the words when it's time to make a phone call. Why does it sometimes feel like switching modes of communication feels like you're trying to speak a completely different languages.