I get that too sometimes, it can be really dissapointing huh?

One year when i was little I dragged my parents up at 3 am to open presents and when i went to bed i dreamt about opening more presents so when i woke up again I was flipping out thinking someone took my presents.

Woops getting off topic there!

Um my advice is to learn to lucid dream or something, then you'll be able to focus on your dreams and know if your dreaming or not.

Also, for the sore neck and twitching eye

You're probably just sleeping funny, like...sleeping with your neck at a goofy angle

The eye twitching, i've had that too, i forgot what it was

but a damp, warm washcloth feels really nice on the eye and helps a bit I think, but that might just be me ( ^u^ )

Hope you get your dream confusion sorted