Step away from the ledge and calm down. Your beard looks good. A spot under your chin is not an issue unless you have a habit of holding your nose up in the air. Even then, people are likely not to notice a spot under your chin.

As to a 14 weeks trim, go ahead. You have earned it at 14 weeks. Just don't take away length or the current style. It is a winner on you. I wouldn't let the barber touch the mustache though.

My Beard Journey:  http://jefffsbeardboard.yuku.com/topic/25137/Finally-I-have-a-Beard
Beard and Bald Thread:  http://jefffsbeardboard.yuku.com/topic/27831/Beard-bald-head-shaved-head-or-buzzcut
Patchy Beard Success Stories:  http://jefffsbeardboard.yuku.com/topic/33742/Patchy-Beard-success-stories-Before-and-After-photos#.ViujbH7nuM8
Taming the Wild Mustache:  http://jefffsbeardboard.yuku.com/topic/30822/Taming-the-Wild-Stache#.Vj_Mh7erTIU