Ear pain and also feeling "full", runny stuffy nose, congested, cough, sore throat, swollen lymph nodes, & now slight jaw pain when swallowing. advice

Colds: Hi you are describing the classic signs of a cold or "upper respiratory infection" if this is persisting or worsening you may need antibiotics or at the least a visit with your health care provider to make sure there is nothing worse going on.

Allergies/cold/etc: It could be allergies, cold, and other infections. You should go to your doctor to have an evaluation and get a diagnosis and treatment.