Engine misfiring 1997 Ford Escort, rough runing

My 97 ford escort, 4 cyldr, auto trans, 122,000 miles, I bought it at 105,000 and was told it had a new timing belt, has been runing rough, I brought it to the mechanic who hooked it up to the diagnostic tool and pulled plugs to view, said that cyl 2 and 3 are misfiring and that it needed a tune-up badly, He had me sit in car and start it and shut it offf 4 times to check each cylinder pressure, said that was ok. This was less than a week ago and hadnt had time to leave car yet.( For tune-up) Yesterday a.M. I started the car and it was chugging more than usuall, I put it in reverse, the car moved a foot then stalled out. I tried to start it but it wouldnt start, sounds like it is half way there, just wont engage all the way. I left for about 5-6 hours then came home and tried to start it again and same thing, wont start. The battery is giving off a charge, just dont know after that? I would appreciate your help. Thanks in advance. P.S- also, the mechanic doesnt believe the timing belt was done cuz the ac-alt. Other belt not in casing has cracks in it and he said when you change a timing belt you do both, and cracks like that only show up after 5 years or so of wear. So from there where do I go? Oh, and I just had a oil change and fuel filter replaced.