The new symptoms are VERY probably not related to the jumpstart, especially if you didn't have any "spark incidents" during the jumpstart. One quick doublecheck: At night, turn your headlights on without starting the car. It helps to have a white garage door or something similar to reflect your headlights. Note how bright they seem, and their color - orange, yellow, white, bluewhite. Now start the car and let it idle. Do the headlights DARKEN or become redder, or did they BRIGHTEN and become whiter? Give it a little gas - not a lot, just a bit. Again, did the headlights darken towards red, or did they brighten towards bluewhite?
If starting the car & giving it gas makes the headlights brighten towards bluewhite, your charging system is working just fine. If they get darker/redder, your alternator is NOT charging your battery... which MIGHT POSSIBLY be enough to make your car run poorly, but only if the battery is now dangerously low.
Open the hood & doublecheck your spark plug cables. It's possible that one of them got bumped or tugged during the jumpstart. If your "Check Engine" light is on, get the OBDII codes from a scan tool.
It's not at all inappropriate for a 4cyl car to jumpstart a 6cyl car. I've jumpstarted a semi (no lie) with a VW. Had to connect to it twice, once for each of the semi's batteries. A LITTLE vehicle can easily jumpstart a HUGE vehicle.