That was me, aged 6-8, and I remember that I was crying, and the feeling that it was something terrible..I can also recall a picture of myself while i was crying, but im not sure if it could be astral projection or just imagination..and in the next moment im with my parents they try to call me down

Why is that a child that young can dream of something that he could never have experienced in any way in his 6-8 years

Can that be connected to other dimensions like astral plane or something like that?

Hmmm, the possibility of it being astral travel related could be possible u.u, though there isn't much info to work with here to be honest, if you can distinctly remember what exactly you dreamed of, maybe then we can find the root of it all.

i know that my parents were really scrict about watching all kind a movies..there was no way that i could see something bad then..
yeah thats the problem, i dont remember i was so little then, i can just speculate.

do you remember if you had one in your youth?

Hmm a bad dream huh u.u? Honestly no, only started having spiritual scary dreams when I was all grown up lol