Bilateral numbness, dizziness & rapid heartrate sounds like anxiety to me. Either generalized anxiety or possibly a panic attack. But of course other medical diagnoses should be ruled out first.
Or carbon monoxide poisoning from the car somehow? Have any of these s/s? Symptoms: "Some of the most initial symptoms of carbon monoxide poisoning would include headaches, dizziness, weakness, nausea, vomiting, and diarrhea. Most severe symptoms of the poisoning are shortness of breath, chest pain, heart arrhythmia, bluish color to the skin and nailbeds, cherry-red skin, lips, and nailbeds, vision hanged, confusion, loss of consciousness, seizures, muscle breakdown, which results in kidney failure.