Big circular growth under my tongue

So I had this big growth under my tongue about a month ago, and it would hurt whenever I would touch it, not a lot, but enough for me to notice. However, it either disappeared or stopped hurting for about 2 weeks or so and just yesterday it started to hurt a little again and that’s when I checked and the big growth was back and with the exact same symptoms. Could someone please help me and tell me what it is??? I am not a frequent smoker at all. Perhaps 1 stick in 2 weeks, I only do it socially and rarely. Any help at all would be greatly appreciated. 

Hard to say David, but i think you def need to get it checked out either at a dentist or your gp

Sue