Several people have expressed that they have suffered similar, and strange symptoms during the same scene in Twilight Breaking Dawn Pt.1, where Bella gives birth to her baby.
The scene is said to also show flashes of red, black and white. These flashes are triggering episodes of photosensitive epilepsy, which means that you get a seizure.
These types of seizures mostly happen to people within the ages of 8-20. They can be triggered by lights flashing off and on in a fast motion.
No Twilight reps have commented or mentioned anything about creating a warning before the movie to prevent seizures.