whats up with my tongue?

ok, last thursday, a week ago, i had some pineapple and since then the end of my tongue has been really uncomfortable and my mouth has been extremely dry. The day after i ate it my face turned really red and it was hot to the touch and my tongue was white.  I have been drinking water and flossing daily and using mouth wash (listerine) 3 times a day.  I went to the dentist 2 days ago and he examined my tongue and mouth and couldnt find anything out of the ordinary and he said that foods high in acid will do that to your tongue and that its because i aggravated the taste buds.  Has anyone else had this happpen, i think i had an allergic reaction to the pineapple. The dry mouth has gotten better and my tongue feels better but should it take over a week to heal?  is the listerine making it worse?  any help would be appreciated.

[StratRebel]

Soft tissue can take up to 2 weeks to heal.  Listerine is NOT good for any kind of burn or allergic response, the alcohol will dry out the tissues and slow down healing.  If you want to use a mouthwash, get in the habit of using a non-alcohol based one.