2000 pontiac sunfire, making weird noise and engine light is on....?

yesterday i hit the brakes too hard and my car would not drive i had to turn it off and then back on. now for the last two days my oil light has been on. and today I hear a weird noise comming from the hood it isnt a squeeking or a clanking. its hard to explain, the noise does not change with acceloration or anything. and now the check engine light is on. is it the oil or something worse. the oil light is red and the engine light is yellow if that helps. if its the oil will that that sound go away? please help!