while I cant say for sure if you are going to get the same results when doing the real test, they were reliable for me. I was using them to detect cannabis and coke, and bought a pack of 5 tests and was consistently testing negative and passed my real test, even with some pretty faint lines on the at home tests. make sure to test your first piss of the day to see what happens in the worst scenario since that's when youre most likely to fail. also drink hella water and eat as healthy as you can. lots of fruits and veggies, also tea to help things kind of move along

my test was at like 4-5 PM and around noon I took like 4 daily multivitamins with extra B vitamins in them (you can buy a solely B vitamin supplements at the store, I just had the multi already) and double dose of creatine supplements (gotten at Walmart in the supplement section) so they would be less likely to realize I was diluting with a ton of water

just some tips for what worked for me, and Im also a female with very similar height and weight to you. good luck!!