Flying pregnant!?

Has anyone went on a plane recently or in the past around 30-35 weeks pregnant?? I’m leaving for Florida at the end of October and I’ll be 31 weeks pregnant and I’m so scared to fly alone and pregnant!! If anyone has any advice please let me know and i know i have to get letters for air line and get clearance from my Dr!❤️😅🤷🏼‍♀️✨