Mouth sore

Mrs • I`m 33 w/3 daughters & a 1 son.. I have been w/my husband 15 yrs, but only been married 5 yrs
Ok.. For like a week now, my mouth has been sore.. It's mainly sore under my tongue.. It hurts really bad when I chew my food.. I do have a tongue ring but it's mainly sore at the bak.. && no I haven't had oral sex since like 2wks ago.. Anyone else goin thru this??