I don't take Valium, but I take Clonazepam. I have also taken Ativan (another benzodiazepine) for flying. I think Valium is only for short-term or occasional use because of its addictive potential. Clonazepam is more often prescribed for long-term use.

I'm sorry you're in such distress right now, sweetie. I hope you start feeling better soon.