for two days i had a tingling and a numbness in the tip of my tongue. i awoke on the third day with and acutely dry mouth and (my tongue was stuck to the back of my front teeth) there was a crack about an inch long starting on the very tip to about an inch towards the back of my tongue. now there is always a slight numbness to it. should i be worried? i have RA, hypothyroidism, and diabetes.