My 22 yr old daughter has been having dizziness, weakness, feeling like her head is in syrup. She sits down and after the spell passes she gets a terrible headache and becomes tired. My daughter had allergy testing 6/27. Out of 21 environmental allergies she was allergic to 20 of them. Since then she had dizziness only 7/2 & 7/3. She had spells 7/11, 14, 18 & 21. They last a couple minutes. She knows what is going on when these happen. She also has PCOS diagnosed 1 1/2 yrs ago. Since then anxiety attacks have started. She is also very sensitive to medications and has struggled with birth control to regulate her cycle. We have a neurology appointment in 3 weeks but until then she is afraid to leave the house. What could this be?