heebeejeebee

i'm on chapter 8. i was past the part where i lost princess after beating mimi, then decided that i would use the return pipe to go and get some health supplies, then i saved it..............when i went to go back into the chapter, it started me at the beginning and i need princess to float across on 8-1 so now i'm well and truly stuck but hoping someone can help me so that i don't have to start the game over. someone must be able to help me, PLEASE!!!!!!! thanksx