Thanks for posting your query at DoctorSpring.com
I can understand your concern.
This does seem to be shingles. Since you took valtrex early in the course of the disease probably you didn't get a crop of blisters but if you observe closely you will be able to appreciate a couple of blisters on the red patch. I would recommend that you complete the course of 5 to 7 days of valtrex as recommended by your doctor.
Please let me know if you have any queries.