So I've been having this exhuast smell coming from the bottom of my car or so lately, the engine bay seems clean, can't really smell anything from there, and the rear isn't smoking and can't really smell anything from there, but under the car, I get some a pretty heavy dose of car exhuast and fumes, so I'm pretty sure the exhuast is leaking or something. So anyways, anyone know where I can get this fixed if it is an exhuast leak and about how much would it cost?

I also smell a bit of gas at startup, which I'm pretty sure's coming from that leak down there too. Goes away couple seconds after startup though.