3 hour glucose side effects

Had my 3 hour glucose today at 8:50 am I felt fine all day till I sat down for dinner and was eating I felt so nauseated then that later turned to me feeling so tired and nauseous I felt like I was gonna pass out as I was sitting down outside watching my kids play. My husband brought me an apple sauce and banana I started feeling better then so nauseous again I went upstairs to check my blood pressure and started throwing up. My blood pressure was low according to my husband. Is this normal?