Stomach virus over a wk? Pain left side neck under jaw; not eust. Tube. Hydrated, no temp, nausea, cramps, fatigue, low appetite, heartburn, burping.

Viral illness. Pain on left side neck under jaw may be part of viral infection -stomach virus.May a lymph glands getting swollen .Since you do not have any other problem ,wait and watch for pain or any other symptom,pain may subside of its own otherwise see your doctor.
Nausea sore throat. This could be many things. Too many to review here. See your healthcare provider ASAP. Stay hydrated. Best if luck. Dr R.