Okay ladies in the past three weeks I've broke out in to a red rash with little tiny welps (about…

Okay ladies in the past three weeks I've broke out in to a red rash with little tiny welps (about the size of the tip of your pinky) it doesn't last long but it itches so bad it's usually on the palms of my hands, arms and my back has this happened to anyone else? Should I talk to my ob or should I make an appointment with an allergy specialist?