Red spot with white ring at back right of tongue

[mrstella1979]

Hi,

Hoping that someone may have some advice on this.  About a week ago I started to get a dry throat, it's not severe, and comes and goes throughout the day.  At first I attributed this to my hayfever, as I was sneezing as well.

However, about the same time I noticed a small, almost perfectly circular reddish pink spot at the back right of my tongue, with a white ring around it, and a slightly numb feeling around where the spot is on the tongue.  

Also, I have had a little rash under my left armpit for the past couple of weeks, and I noticed spots on my right kneecap.  Within the past couple of days I've began to feel quite run down as well.

Up until very recently I was a smoker, so obviously when I discovered the spot on the tongue I instantly thought oral cancer, even though I'm only 27.  Ive done as thorough an examination on myself as i could and can find nothing else wrong with my tongue.  

I've made an appointment with the doctors (closest they could fit me in was monday), but I was just wondering if anyone else has had something like this because I think I'm starting to go out of my head with worry.