Everything looks good, normal to above average progress for five weeks. Cheeks are normally the slow growers. I do not see anything in your photo that suggests to me a trim is needed. I suggest you let it get longer before trimming. But, trimming is a personal preference decision. If and when you do, take care to take only a small trim at a time. Give yourself time to adjust before becomming aggressive with the trimming. It is to easy to trim away good growth and then be disappointed. Trimming errors are hard to overcome, and I know several guys who have given up and shaved after a poor trim job.

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