Hello guys I need advice about shingles

Hello Guys I'm 15 years old I recently got a cluster of small pimples and they where red and did not have any pus or water in it and they where very small, I did not have any pain at all and no itchiness they where they where located on my lower back side on the left but it was very small and only 3 or 4 pimple that looked more line acne without pus could that be shingles I googled and I'm scared that maybe l'll be immunocompromised.