Preg with 3rd baby and have GD

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32 weeks n4 days but baby's reading 35 weeks n 4 days I feel like a bad mommy I had GD with my other two but didn't have to take meds just found out I have to be out on meds kinda disappointed the doc didn't make me feel any better like its all my fault :( but my diet has been good no pop or sweet I try my best to eat right just seeing if any one else is in the same boat?