It happens usually at first attempts after separation, when you look at your physical body your astral body instantly gets back into your physical body. So you shouldn't look at your body, and use your will to move forward to another room.
Just remember practice makes perfect.
Re: Seperated but can't move
By: marc2727 Dec 23, 2015
Post # 4
That happened to me also but didn't know what is it,I feel like darkness craving at me when I know I'm dreaming but now,I know that it isn't dream at all,when I look on my back,I see my body asleep and my mother leaving in the room.She was awake because of chatting with my father from abroad.I was shouting but my mother can't hear until I calmed myself and realize that its my end,sometimes when I'm asleep with severe headache,I feel I was seperated from my body hearing a loud vibration.I forces myself to be awakened but still sleepy.Now,I know that I'm lack of meditation and I started it until now.