In answer to all of those questions, it sounds to me like you had a pretty low lucidity dream. If you aren’t sure why you did something that sounds a bit like the “trance” state of consciousness of normal dreaming. As in, you knew it was a dream but you were still tired enough and not alert enough to still act like it was a normal dream. Additionally, speaking from experience, low lucidity dreams seem easier to stay in for longer than full/high lucidity dreams, i.e. where you are about as conscious as you are IWL. I have found that in high lucidity dreams I tend to get pretty overwhelmed with the vibrance and realism of the dream world that I get overexcited and wake up.
Keeping a dream journal is the most important thing but peanut butter helps me. The day or the day after you eat it I find you generally get a really vivid dream.
I once had a LD where i puked up something really cold that was a metal necklace then i woke up but if you know any reason i would puke could you tell me 
Sorry for givnig an Off-topic reply, I’m no veteran or authority beholder here, but instead of spamming multiple topics wouldn’t it be nicer to condense all your questions into one topic? Like, LD curiosities thread or something? 
About the dream, that requires interpretation, when you puke something, your stomach is rejecting whatever is in it, ever seen an animal and felt it was kind of sick? That object could represent something you reject, but that is layman’s interpretation.
[mod]This post was one post in one of many topics that were merged into one. 
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im not able to think of a lot of questions at once its just not the way my brain works
You don’t need to, there’s the edit button for that ^^
But, hey! What do you think? Can you recognize something in that necklace? A person’s photo, a shape, the chain’s pattern? There could be more meaning to it!
it was a necklace with a circle thing at the end like a sphere middle
Instead of running away from him, why haven’t you faced him? Asked why he was chasing you? You could have found something revealing about yourself.
why i didn’t tell him to get out of my dream idk but why i didn’t ask him is because it was a long time ago and i was scared of him so naturally he entered my dreams so i already knew