My car smells weird, like sweat, It makes a chugging noise every time the car starts up?

Hello, my name is Jessica. I know nothing about cars, so I will do my best to explain what is going on with my nightmare of a car. In June of 2021, while driving the vehicle, there was a loud noise coming from the back of the car, where the gas tank is. I pulled over as soon as I could. I open the gas lid. The check engine light came on after about two miles of driving. I arrived at my destination, and when I turned on the vehicle, the check engine light was gone. I didn't drive the vehicle for a few days, but after only driving for 2 minutes, the check engine light turned back on. The vehicle was taken to the Ford dealership to be diagnosed, but they only checked the codes and nothing else. They said that the EVAP system needed to be replaced. My father replaced the EVAP. The check engine light was erased with the code reader. The engine light came on after two weeks of replacing EVAP. The code reader says that there is a misfire on the cylinder. We have changed all the spark plugs, and we also replaced the sensor. We moved the coils around to test them, but it only read as a random misfire. My car smells weird, like sweat, and it doesn't matter what we do to it; it won't go away. It makes a chugging noise every time the car starts up, and it gets worse when we use the heating or air conditioning. Also, the RPMs feel higher than normal. I am really scared, and I don't know what to do anymore or what to do next.