My Teenage Daughter Has Gotten Body Tremors The Past Two

My teenage daughter has gotten body tremors the past two weekends. She had them a few months ago and doctor thought allergic reaction. Not seizures. Symptoms - happen randomly, before bed, gets dizzy, mouth dry and sometimes swollen tongue, difficulty breathing as if she wants to tell her brain to breathe, tremors sometimes upper body, sometimes lower body, sometimes both. Gets super thirsty and afterwards very tired. Want to get a referral from pediatrician this week for neurologist. Reading too much on internet. Trying to self diagnose.