Sleeping

Q: Can you please explain the sunnah method of qailoolah (i.e. how long should one rest? What position and when? Also do you have to sleep?)

Q: When I sleep, I become paralysed and I can't move my body. I feel like something is pressing on me. Some say it is some scientific thing but I know it is a jinn because the moment he releases me, I read some verses and release it in the air and it stops. What can I do to kill it?

Q: Is it allowed to sleep naked wihout clothes during the night or after having relations. Particularily I am asking about the wife and is it allowed to sleep in half cut clothes like bra and panty only or in a maxy?

Q: If a mother sleeps with her thirteen year old son who is not baaligh and there is body contact e.g. the mother holds the child. Is there any sin and does it affect her nikaah?

Q: When sleeping, the Sunnah is to sleep on the right side with the right hand under ones cheek. What should one do with the left arm according to sunnah? Should it also be folded and the left hand placed by the head or should it rest on ones side or what should be done?

Q: Can a brother and a sister sleep in the same room?