At first I thought this was going to be a post about your love-life...Post this stuff in the right forum next time..
Sounds like a misfire. Check all 6 plugs, and wires. Pay attention to when it does the herky-jerky. Cold starts? Engine bay not warmed yet? Extremely cold out? Raining? Foggy/humid? Spray water on the plug wires, see if it does it.