Trying to design a New Era SnapBack Baseball Cap, but CAN NOT FIGURE IT OUT, Please help!

I’ve tried the Sweep tool, the loft tool and the revolve tool. Nothing has worked. The opening of the hat can’t be perfectly circular, it has to be slightly ovalized, I got the exact oval I need, then I drew the 2d half profile of the shape of the outside of the hat and tried to sweep that profile to the oval path but it says something like “object will not form properly, it will overlap itself”, or something like that? PLEASE HELP, ITS MAKING ME CRAZY!

Some screen shots or a movie would get you better help faster. Difficult to understand your exact problem.