Hi and welcome to the Migraines & Headaches Community.
You can have a migraine and never experience the pain from one. Auras, nausea, etc are migraines. I suggest taking some migraine medication (IMO Excedrin is the best OTC med there is). Auras can occur before, during or after a migraine, I am not sure how rare it is but I have them frequently too. For nausea I suggest taking 25mg Meclizine, 3 times a day as needed. I know it sounds odd but it really does work. Good luck.