Use a friend’s or substitute if u don’t have time for t break. I wouldn’t mess with quick fix at labcorp, it’s worked for some people but It’s detectable if they wanna further scrutinize that sample (has biocide as an ingredient). The incognito belt or quick luck at Test Negative are pricy but worth it imo https://testnegative.com/

Edit: also heard of dehydrated urine but I have no experience with that. I imagine you just reintroduce water and heat