When I think of some things I start to twitch and want to clutch my ears shut

I am sorry to hear that you are experiencing this type of reaction. This sounds like to me that you may be experiencing panic attacks or some type of anxiety-related episodes.  How often does this seem to happen?  Is it only when you think of traumatizing events or situations? It is not unusual for people to have this type of thing happen.  You can go to the doctor and explain your symptoms. Your doctor can refer you to someone that deals with anxiety issues and prescribe some medicine that will help control them as well.  Good luck with it, and I hope you get the help you need.