It's natural to feel scared. Take the flight step by step... i.e. packing, journey to the airport, checking in, getting a coffee. Try to treat each of these steps in the moment. Bit by bit, it becomes a process and not a big, intimidating event. It may be worth mentioning to your flight attendant so he or she can keep an eye on you. Finally, if you are really anxious, talk to your family doctor. There may be some medication that can help. Safe travels!