Okay....I just answered my own question.

My issue is a "common" side effect.

Common side effects of Monistat Vaginal Cream include burning, stinging, swelling, irritation, redness, pimple-like bumps, tenderness, itching, pain, or flaking of the treated skin; headache, burning/itching/pain in the vagina or urinary opening; or lower abdominal cramps.