To take full advantage of the site, you need to make a daily promise to the entire KTC community that you will not use nicotine on any form. You do that by posting roll.
Here is a link with directions on posting roll. You will be a member of the
March '18 quit group.
Five days on your own is badass. However, the support you will find here will greatly improve your chances of remaining quit. I'm 679 days clean, and still post roll daily. It's my best chance at remaining clean.
Jump in with both feet, and drink the Kool-Aid.
As far as the throat and mouth pain, think of it like this: Your mouth and throat have been under constant attack by you and tobacco. The nicotine has acted as an analgesic. Your mouth and throat are finally getting a chance to heal. They will heal eventually.