2001 Chevrolet Tracker Please help

I recently bought a 2001 chevy tracker from a dealership, the car fax was clean. I drove it to my dads house which is an hour away and it drove very nice on the highway and I continued to drive it on the highway and it drove very nicely. Than yesterday I drove it home from my fathers and the air conditioning is broken so I had it where it brought fresh air inside the car, and I had it set on cruise for 74mph. As I was driving and I had about ten minutes left on my drive I started to smell something burning it was a horrible smell and I just assumed it was from the outside and five minutes later the passenger side I started to see smoke( it was kind of white and not much of it), I turned off cruise control and turned off the a/c which brought fresh air in. My tank was empty so I filled it up to half a tank and since I was home by the time this all happened I'm not sure what happened. This is my first car and I have no idea what could possibly be wrong! I checked the oil and it was fine also, and now when I try to start the car it makes a weird noise that it didnt make before. Help please!