If you've experienced something traumatic, it's normal to have reactions and responses (symptoms) that you may not have experienced before in the days and weeks afterwards. This is sometimes called an "acute stress reaction". Often these symptoms will go away on their own after a few weeks, but if after a month you're still experiencing them, you might be given a diagnosis of PTSD or C-PTSD. To get a diagnosis, you must seek advice from a healthcare professional.