Small problem...i think

Need help!!! Car is stalling when i dont accelerate and when im driving it starts jerking. Left car for 24 hrs came back to it and it was fine, drove for minutes no probs. left car for around half an hour went to drive it and was doing the same thing. Then after a few minutes problem went away, turned off engine for couple of minutes then it was not working again. It is a petrol model. Sure i never put diesel in it as I put fuel in car day before and drove it for miles so certain thats not the problem. Have been driving the car about as after driving car through jerking and stalling for 10 mins it goes away. Seems to me that it is a very minor problem. Seeing as its after xmas dont wanna put in a garage, have tried changing ht leads, didnt resolve issue. Suince i dont know mucj bout cars have to think logically and am considering changing fuel filter, do you think this will resolve the problem>? or any other ideas? Appreciate any help George