Under tongue red bump with white in it?

Hello,

i am going to contact my dentist as soon as possible, I was wondering if someone can tell me what this mighr possibly be?

Around a day ago I started having an aching feeling in the lower right gum area somewhere in the back and now today I noticed this under my tongue.

its kind of freaking me out and im unsure if i should eat incase it makes it worse

It is nothing serious. If problem gets worse see your dentist.