I do not know what's adverse has happened to you since then you are feeling worse, you need to talk about it with somebody. Mind goes everywhere some times in past and sometimes in future. It is its normal working pattern. If something goes wrong it tends to focus on it again and again. You have to make conscious effort to bring back it to present. Try it it will help you out.
Next Steps
kindly take professional help so that you can come out of it.