I'm confused about what my loop recorder is actually doing!

I've had a loop recorder for about 18 months. I'm very confused about what this is actually doing or just supposed to do. If I haven't recorded my own symptoms (such as fast heart beat when I wake up at night), is it still monitoring my heart's activity? If not, it seems like I'm sleeping through any other symptoms that may arise and they aren't recorded! I know, I need to ask my doctor. I want to ask here first so I can understand this and not feel stupid! Thanks for any advice.