It may be some time since you did reflective writing; some people are quite alarmed by the prospect. One of the main issues here is that of confidence. Some teachers suspect that reflective writing has a particular set of formal requirements which they haven’t met before, or have forgotten. But this isn’t true; there are some conventions which allow reflective writing to happen, but they are based on common sense, and are fairly flexible. You may in the past have been confronted with quite specific formal requirements (‘ Never write in the first person!’) for academic writing, but the expectations around reflective writing are much more diverse and relaxed. It is, after all essentially personal. If you can think about what’s happening to you, and try to understand why and what to do about it, you can do reflective writing.