Yeahh its fine !! I had a mini vacay when I was 13weeks. Its just a lil bit unconfy because my flight last 4 hours
Yes you are fine to fly in the 3rd trimester youashould be cleared by a doctor before doing so but you are still so early it's fine. (They just don't want you going into labour on the plane) pending you already being on bed rest if you are just double check with your doctor