Punching pillows, throwing balls of wadded up paper or stuffed animals, or just plain screaming have helped me when I've gotten a bad flashback. You should be reporting this woman to the police for harassment&threatening-try to make yourself safe from her, she sounds dangerous. Don't confront her, it will just escalate. Maybe even a restriction order from the local authorities would help because if she came w/in so many feet of you or your house, she can be arrested. If she comes back, don't open your door, just call 911. I know flashbacks really hurt&I'm sorry to hear about yours-it may not sound helpful, but, sometimes you just have to ride the accompanying feelings out.