1993 grand am 3.3 runs and then dont run!?

PLEASE HELP! this car ran fine when we got it used 6 months ago till abut 2 weeks ago, when it just stopped one day for a week. when i was told i needed to get new ignition coils. so i got them and also plugs and wires. when i came home i figured i had to push it back so i could work on it, but i forgot thats what i was doing and i turned the key and IT WORKED!!! but only for 3 days. so i replaced all the above and it started up and drove it for about 30 min when it suddenly left me stuch on the side of the road again. it has been 2 days now and i got it to start this morning it just shuts off! no spitting or jerking or anything like that !