Once your dentist has taken an X-ray he'll know what's wrong. Once I was in contact with the paradontist I stopped with my dentist, in fact my dentist transferred me to him. A dentist looks after everything you can see in way of teeth whereas a paradontist looks after what's hidden below. By the way, have your teeth moved lately, like having a gap between two teeth when one wasn't there before? That's a sign you need to see a paradontist as there's something going on underneath.