1997 Dodge Stratus Stalling

I'm trying to figure out what is causing my engine to stall. It started as just being a random occurrence, not connected to stopping or accelerating. I would usually have to wait about a minute and I could restart it. Then I could continue driving for a while, and it would stall again. So worried that I would be stranded somewhere, I took my car to my parents and borrowed their car for a few days. I then had to return their car and returned to mine, where it ran fine for about a day and a half and started stalling randomly again. So I replaced the fuel filter and then had the fuel injection system cleaned. That seemed to fix the problem for about a week, then the car returned to stalling, but had gotten worse. I couldn't stop at lights without keeping a foot on the gas pedal to keep it from stalling and it made turns difficult because it usually stalled during the turn. So it seemed that if the car would sit for a few days then it would drive fine for a day but start stalling after. It got to the point where as soon as I put the car into drive it would stall just in my driveway. It starts and idles fine with no noise or coughing, it just can't be driven for more than a day without the stalling happening again. My dad suggested the fuel filter, but I don't want to start replacing a bunch of costly parts to find out that I'm not even in the right area. Also, my check engine light came on before all this started and I got the code for the EGR but it then went off and didn't come back on. I don't know where to go from here, so any suggestions would be appreciated.