Ok guys my motor seems to be acting up and I don't know wat it is. This is wat happens:

I'll be driving normal and if I park my car, and shut it off....for like 2 or 3 mins....and I try to turn it back on it won't start...I sumtimes have to press the gas while I turn the ignition and that seldom helps......I have to wait like 5 mins after I tried to turn it on then it will start right up......