so how about i did all this sweating for nothing
You sure did.

Sweating is virtually useless because very little THC is excreted thru sweat.

You could burn enough fat cells to signal the local fire department, and sweat up enough to fill a water tower, the amount of THC metabolites being excreted thru the sweat would still be miniscule. The rest of the THC metabolites are being excreted thru the urine and bowels.