The FAs have designated "jump" seats during takeoff and landing, they won't be able to sit beside you. You could ask if there's a deadheading crew member aboard who could.

My wife used to be the same (she got over it, but it took years) and taking drugs didn't seem to do much good except turn her into a zombie for a day or so. Just remember you're safer sitting in an airplane than you are taking a shower at home.