Not to be ofensive, i am heavy too,but at your size, fungal skin or candida skin infections are likely, like in the creases o your belly and places like that. You would feel it though. I have heard many people say they have strange odors though when they have liver problems.I notice a weird smell on me like bm and burned hair. Even when I know I am clean., at least bathroom wise. Showers help.I have been smelling this off and on for a year, just diagnosed with fatty liver. Liver is swollen they said.
Thats something I noticed with my liver disease, since I was a child, I sweat. And I'm not talking about normal levels, I'm talking about excessively. Hands. Armpits. EVERYWHERE. Mostly under my arms though... and I've always been embarrassed about it... BUT! There is hope. It burns like hell, but put apple cider vinegar under your arms... It works, and gets rid of the smell. I went from doing it every day to a few times a week, or whenever it was bad in general. My mom, who seems obsessed with embarrassing me about it... in public.... learned this via Dr. OZ. and it works. Well, it helps.
Hope that helped, at least a little.
~Rose