Past 4 days get worse swollen gums swollen glands bad headache feel extremely cold sore thoat today woke w/ small mouth sores nausea sudden ab pain?

Go see a doctor: What you have can fit into a number of things. You will be best served by going in person to seek medical help. A physical exam will result in proper diagnosis and treatment.

Need evaluation: Need to see both your physician and your dentist. From the little you have reported it seems that you may have a bacterial infection, a viral infection, both, or something entirely different. May have 2 separate problems at the same time. Please make appointments for comprehensive examinations.

Mouth sores: Sounds viral... Maybe gingivastomatitis. Have your doctor take a look at those sores in your mouth.