What Causes Bumps On The Forehead And Puffiness On The Face?

I was eating couple of vegetables, fruits and dry fruit in a bowl and after eating 2/3rd of it, I start feeling bumps on my left side of forehead, little rigidity in my face, and again bumps on my right side of forehead, and little puffiness on my face. The vegetables I was eating were carrots, beats, mushrooms, avocados, asparagus, dry fruits like almonds, raisins, other fruits like cherry, blue berries, and small salad tomatoes. I don t know what is this , allergy or anything else, I took Benadryl 25 mg as for precaution from any allergies. Got anxious.