Strange sleeping problem?!

For the past couple weeks ive been having a strange problem sleeping i'll be laying there and all off a sudden i can hear my self sleeping hear background noises and everything perfect but i cant move i am asleep its like my body is asleep but my mind is awake and completely concious some times i end up completely drifting myself to sleep other times i jar myself awake.
my family has a history with sleep apnea but my mom says she has heard of nothing like this
a couple nights ago i laid there for what seemed like 15 - 20 minutes before i could wake myself up
any suggestions or ideas what is going on would be helpful just incase it is relevent i am male 29 no known health problems