This dream and your description only show that you are more afraid of Mao Mao. In fact, since you are afraid, in reality, you just need to avoid such a thing. As for dreams, there is no need to be afraid, because the scene in the dream and your state in the dream are more or less abnormal from reality. If you pay attention, you will find that you are only dreaming. So the next time you have a similar dream, tell yourself it's just a dream.
Here can tell you some tips to deal with nightmares. When you dream that you have been shot by an arrow, only the heat is painless and you can't die, then you can tell yourself that this is just a dream. Another dream is that I fell from a very high place, surprised in a cold sweat but unscathed. This must be a dream. There is also a dream that something dangerous comes near you, such as something from Mao Mao. You want to run, but you can't shout at your feet. It must be that your sleeping position is incorrect, which leads to your chest being crushed and so on. So when you can accumulate experience and tell that you are dreaming at the first time, you are naturally not afraid.