1. Clonazepam and propranolol will be helpful. You may experience drowsiness. If you are asthmatic, don t take propranolol. But otherwise, these are safe medicines. However, usually these medicines are not available without prescription. Ask your family doctor for a prescription. Another medicine that will give quick relief is Alprazolam (Restyl, Xanax, Alprax) 0.5 mg just before the flight. Be careful. Do not take Alprazolam for longer period without doctor s guidance. It is very habit forming. You will probably need a prescription for it. 2. You should explain to your parents that your have a medical condition. It is not all just in mind. It will help a lot if you request your doctor to talk to them. 3. If you take proper treatment for OCD and Agoraphobia, you will be able to live a productive and happier life. Therefore, you should see a psychiatrist. He/she will evaluate you, counsel you about your condition (also counsel your parents) and initiate proper treatment regime. Usually a combination of medicines and psychotherapy such as Cognitive Behavioral Therapy gives best long term results. I hope this answers your question.