Hello all. Our house is approximately 13 years old. Each morning when both the iron and blow dryer is plugged into two separate GFI outlets in the master bathroom, the circuit will trip the 15 amp breaker in the breaker panel.

Is it possible to upgrade the breaker to a 20 amp without overloading the existing wire? (It's rare that the blow dryer and iron are on at the same time, but when we don't think about it and plug them both in - trip)

Am I mistaken to believe that the circuit should be tripping at the GFI outlet instead of the breaker at the panel? Is it possible that my GFI outlet is faulty and could just use replacing even though it tests fine using its own test button?

Any light you could shed on this is greatly appreciated.