Hi. I take it you've never had one before?
Yes - see if you can figure out what triggered it. Some common things are red wine and chocolate (I think I'd die if those triggered mine!). For me, it is intense bike rides - I don't get vision disturbances, but I get sensitive to light and sound and have severe nausea. I need to pre-dose with Ibuprofen before the ride and then rest and drink lots after hard efforts.