I Dreamt Of Waking Up Twice

I had a dream within a dream. In the dream within the dream I was hanging upside down. I can't remember anything else. Then I thought I woke up, but I was still dreaming. I was in my childhood home. I hear someone opening the door and coming in hissing "wake up". As I'm in the room from my childhood I assume it's my mother wearing a dressing gown. But something is off and feels a bit spooky. The creature keeps hissing "wake up" and starts shaking me. I get annoyed and say "what is it?" and this time I wake up for real in my bed feeling confused, wondering who wants me to wake up so badly and why.