trouble shifting gears
 

I have a 98 Accord Ex with an automatic transmission. It has about
115K miles on it. I have never had any problems with it but last
week, without warning, my car seemed to have difficulty changing
gears. When I accelerate it sounds like it is trying to change gears
but is stuck and then will suddenly switch. It causes the car to jerk
forward a little bit. When I come to a stop it jerks forward a little
bit then too. Kind of feels like somone lightly rear-ended me. The
next few days were without symptom. Then yesterday the problems
started up again. Today they were worse. The "check engine" light
came on today. Any ideas?