Is it normal randomly smelling death?

Idk if this is even real or not but I keep randomly smelling the decaying bodily matters type of smell. I know what youre thinking, yuour fuccking gross and clean your room or brush your teeth / shower (since i smelled it usually in the mornings) well I do all that. so then i smelled it while att work today some lead to believe its emonating from inside my nose. i also have a few other symptoms of sinus infection which i read could couse the smell (facial pressure, nausea), but its very mild so im not sure if this is even real or im just overreacting. anyway IIN.