I have experienced dizzy and fainting spells twice this week. I work at a hospital and my blood sugar and blood pressure has been checked and is fine?

Multiple causes. Dear Shelby, You are right, dizziness and fainting spells can be caused by low blood sugar or low blood pressure. Medication side effects, dehydration, irregular heart rhythms and neurologic problems can also be the cause. Since it has occurred more than once, would best to be evaluated by a healthcare professional for further recommendations and an exam.