Does this sound like shingles or allergies?

I have had a rash since Thursday night. I thought it was an allergic reaction to a new food i tried but the rash is still here. There are three clumps of bumps on my right lower stomach and one on my lower back. They only itch when something rubs up against it and they don't hurt unless i accidentally scratches it but the back one has a slight dull sting every now and then. The rashes range in size from a quarter to an inch long. It doesnt go in a strip but they are on the same side. Could this be shingles? I didnt have any flu-like symptoms before the rashes and no itching or pain before they appeared. Also, I took 3 doses of Benadryl yesterday and woke up this morning to fewer bumps but the ones that are still there have black dots in the middle. Also, if it is a food allergy rash, could it still be there because I keep touching it and could have possibly infected them? Oh and Im 22 years old if that helps.