You are a girl, depending on the female corpse in your dream, how old she is, whether she is a girl or a middle-aged woman.
Corpses usually represent the past. You refuse to carry a body, which shows that you refuse to let go of one thing in your heart. What is this? Usually this kind of essay can't be found.
But the feeling that this incident gives you, although there is some pressure, is a burden, but you are willing to do so, and you subconsciously don't want to say goodbye to it.
Another possibility is that this body is a dead part of your personality, and you should abandon it, but you didn't. You think it's worth keeping.