My nephew (DN?) has a few tics and was seen by a neurologist last year who said that he doesn't have tourettes so it is possible to have tics but not tourettes. In DN's case none of his tics are vocal which was part of the reason he doesn't fit a tourettes diagnosis. The neurologist said that there are so many kids that have tics that they are now starting to think it is more normal to have them than to not. Now I'm not saying to ignore your gut instinct or to not investigate further but maybe that will help ease the stress while you search for answers. Good luck!