I started to meditate in a comfortable chair as I keep falling asleep

As I went into tape 3 and entered my AC, I felt like I was floating within my body, OH my mind went, I am aware.
Then I saw a strange door which was not put in my AC by me, I felt so excited, like I was being invited with love. Then as I opened the door a light shone all around me, it is so beautiful, I started to cry, I am still quite shaken.
I couldn't see anything, just light and then a child singing, the voice was beautiful, angelic, I sat down trying to listen to the words as his voice seemed so far away. Then I felt myself coming back, waking, but the voice was closer.
I am astounded to say it was Billy (my son) singing a song he was writing
"It's in all of us, why can't they see, it's in all of us"
As a student to the AC can someone explain the experience to me? I am going to see if I can record it. I asked Billy how he thought of the words, he answered Mum I just feel it. So can the two or three worlds be linked into one during meditation?
I feel so at peace and I also must mention Nicola crossed my mind as the warm light covered my body. I do hope it was a healing for your headache.
Love and light to all Namaste
Gypsie Deb
PS: I forgot to mention when I picked up the laptop to type it was 11:11 on my computer, we are never the time the post is on the board, which I still can't work out. It just gets better!