I am 18 years old student. I have a sleeping illness. During my sleeping when I trying to wake up ,i can?t do it. I can?t wake up ,something try to hold me in bed .at time I have more pressure to arise .i thought what happens to my body. At last I woke up. It happens sometimes. at least once in a month .this problem begins since 3 years. Sir what is the disease ,please sent me the reply.