Hi, that’s understandable that you’re nervous. I flew a few years back with POTS and it is a little harder. A few tips I have are to take an empty water bottle through security and fill it up once you go past security. In a lot of airports they have water bottle fill stations. Also take a throw away water to have right before security so that you also have water while you’re waiting. They will also give you water on the plane if you ask. Have salty snacks in your personal bag. They’ll also have some in the plane, but definitely take your own. Wear compression socks if you wear them and hydrate A Lot beforehand and keep up with your salt. If your traveling alone then maybe try to have a medical bracelet and I would personally tell a flight attendant about your condition in case something happens. Maybe print out a medical paper to give them. There may be tips for flying with medical conditions on the airport website. Good luck with your flight, I hope it goes well 😊

Compression socks or even better compression leggings are a huge help for me. I also wear sea bands when I fly. I’ll second the water bottle and salty snacks as well!

Im not sure about flying, but i have issues with any sitting upright. I need to be at more of a 30 degrees from vertical. So, You my necessity move of sitting, might help you. It has brought some flares to a quick stop. I scoot to the front of the seat as far as i can and then bring knees to my chest to get my heels on the seat. Then relax knees and back so the abdomen is not too scrunched. Im not sure why it works but it does for me.