This dream may symbolize some aspect of your life that you need to take care of and get done. The pumpkin might also represent the things in your life that you have put off for too long. It is time to start working on them and get them done.
Alternatively, the pumpkin may represent some aspect of yourself that you need to work on. Maybe it is something you have been avoiding for fear of failure? Or maybe it is something that has been bothering you but you are afraid to talk about? The time to address these things and get them done is now.
Finally, the pumpkin may also represent the Halloween season itself. It is a time of year where people are happy and enjoy themselves. This might be a time where you feel like you are starting to enjoy yourself too.
This is my interpretation of what it means to dream of a pumpkin. At times, the best interpreter of a dream is the person who had the dream. Always keep your own life and nuances in mind when trying to determine what you think a dream might mean, or if it meant anything at all.