My first conscious astral projection

[moviestar]

I've been trying to astral project for a couple of weeks now, with no luck. I tried all sorts of things, like invoking my guides, lucid dreaming. Until yesterday I got ill and went to sleep.
I have a cold right now and my body is really weak. While sleeping in this state I woke up in my room but it was different. It was like an evil shadow lands version of my room. Now this was scary but nevertheless I was curious. I wanted to really get out into the room but I felt an evil presence which was manifested by a shadow on the wall (later when I woke up the shadow was there, so I really was seeing my room). Then I heard a voice say to me: "You must move into the feeling".
The most intense feeling was in the left side of my body, the side where I felt the evil presence most (it was sort of an electrical tension). So I started to consciously feel that part and it worked, I dived into that place. Unfortunately I don't remember why (probably was too afraid) I just blacked out and woke up.

I read somewhere that you can't really astral project until you're 30 years old or more because earlier your body is too strong. I find this true (I'm 23). Do I need to be sick to astral project?