05 Neon Bogged Down

I was driving down the road at 45 mph and noticed some surging in the power of the vehicle. I stopped at a light, and when it turned green, I pressed the gas pedal and the car didn't move for the first 7 seconds or so, then started to creep forward. I gently pushed the gas all the way down, and the car was not going anymore than 5mph. It wasn't revving up either. It took approx 1.5 min to get to 40 mph, with the car verrry slowly gaining power. I needed to turn, stopped in the turning lane and waited for traffic to clear very far, and it was 'chugging' during the stop, once again creeped out into the intersection, and then it died. I threw it into neutral and started it back up, and creeped out of the intersection (without getting hit luckily). After I got out of the turn, the car gained power as normal and I continued on my way. It's done it much more mildly the last couple of days or so as well. I've got people telling me it's my spark plugs, catalytic converter, fuel filter, fuel pump, oxygen sensor, crankshaft sensor, or injectors, or a combination of such. The odometer gives no error code. What do ya'll think?