I have the same thing. While driving if a car honks or a train goes by really loudly, I jump a foot. The worst part is how hard my heart beats after I am scared. If my husband coughs or snores while I'm falling asleep, it scares me and takes awhile for me to calm down. I've worked it out at work, one employee coughs before he walks up behind me and my boss taps his feet behind me so I know he's coming in. I am determined to work as long as I possibly can. I am slowly letting my employees know what is going on with me so that nobody is coming to their own conclusion.