I've always had these recurring dream, I'll describe it to my best. New here, so any help and/or interpretation would be great. Thanks in advance.

Since I was a young girl, I've always had a dream about some type of hill, covered in green grass. A blanket of pretty flowers grow atop the grass, and I am walking on top of the hill picking the flowers. Suddenly there's this big boulder, like HUGE that rolls behind me, and my obligation is to pick all of the flowers before they get flattened by the boulder rolling behind me. I remember picking as much as I could and as the boulder gets closer I usually wake up.