Head congestion, dizziness, anxiety, burning sensation on back of tongue, and nausea all of a sudden. Head cold or something else?

See below. Please call your primary care doctor to help you figure out what's causing your symptoms. Good luck!
Not enough info. Duration of symptoms? Fever? Change in Meds of supplements? Diet change? So many more questions that have to be asked as part of your medical intake. You also need to have your throat and oral cavity examined. Lab tests may be prudent. Please see your GP or Urgent Care for an examination.