Unless your situation is an emergency, you should first call your PCP's office. Follow their instructions. Your PCP's staff has your medical history. They know the medications you're taking and whether you're allergic to anything that can affect the care you receive. Your PCP will help you make the best decisions wherever you are.
Emergency rooms are to be used for emergencies only.
Use the ER or call an ambulance when you're in a life-threatening situation, or if not getting medical care fast would lead to permanent loss of a body part or its function. Let your PCP know on the next business day that you've gone to an emergency room. You don't need to end your trip if you've forgotten medications. Also, your doctor may call a prescription to a pharmacy near you, even if it is not nationally known. You'll need a nearby pharmacy's phone number.