White exhaust smoke?

I was driving for 10-20 minutes, I park to head in a store for about 15 minutes, got out and drove for like 9 minutes and parked for about 5 minutes and during that time I revved and noticed smoke coming out my vehicle exhaust and smelled a little burnt but not mildly it’s like if something is burning far away and you get a whiff of it smell. Once I got home and shut off the car for like 20 minutes I revved again, and nothing came out? No smoke, no smell, no nothing. I checked and some people said it could be blown head gasket but there was no coolant leak, no loss of coolant and my oil was on level. I don’t know what it could be.