for the past few days anytime i go somewhere and the car is parked for at least 20min. i go to crank it and it doesnt want to! it takes about 10x to try then it finally starts! well right now it is parked at a family members because now it doesnt want to start at all. it will turn over like it is fixing to, but i give it gas a little and then it just cuts off! i changed the spark plugs today and that didnt do it! so i have no clue what is going on here!? bad gas? starter? alternator? help!!!