Almost one week after the gardasil shot

It's been almost a week since Krista got the Gardasil Vaccine. She has had the worst of her episodes last night after I gave her Advil for her headache and joint aches that were keeping her up. Her "normal" arm and leg twitching turned into seizure like twitching, her entire body shook. It happened about ten times, one after another, until if finally stopped and she fell asleep. I watched her sleep for a while and she twitched a little, in her leg, off and on before stopping for most of the night. She's ok this morning with just mild twitching in her arm so far. My husband is starting to believe it's psychological and that breaks my heart bc it's not. It's true she is worse and twitches right away if we bring it up but no child would no this willingly for attention or anything else. It's killing me that no one believes me or her. I hate this.