Riding in the back seat of the car or in overcast weather i sometimes get shortness of breath, dizziness, nausea, bloating and swelling in the nose

Car sickness?: There are many people who get a form of car sickness. This can mimic migraine symptoms with severe nausea as well as flu-like features even without definite headache. Try to sit in the front and watch the scenery and perhaps take medication prior to the trip. Get a thorough medical evaluation to be sure some other medical problem is not present.

Vertigo: You may have an inner ear issue giving you vertigo. Meniere's disease comes to mind. It is a disorder of the inner ear that causes a sensation of a spinning motion. Nausea is often a problem. See your family doc for an eval.