well, do you make a lot of short trips? sometimes if you do, gas doesn't have enough time/hot enough to fully burn properly you'll get bad smell from exhaust usually.
look under the hood, do you notice any leaks anywhere?
coolant spill on hot engine doesn't smell like victoria secret store ;p
when your engine is cold, open up your oil cap and check how your oil looks on the cap, any signs of water or coolant there? (i'd hope not then your headgasket might be shot).
check condition of your drive belts, check undercarriage for any leaks.
i'm not trying to scare you, just trying to help find the cause of the smell
i'm sure there's other things that could be wrong or checked but i haven't had my coffee yet ;p me sorry