Amazon cheap pregnancy tests

Rebecca✨ • 29,FTM to my 2 year old daughter && coffee-obsessed!
I bought a huge package of opk tests and pregnancy tests off Amazon a few months ago. They didn't come with an instruction booklet so I have absolutely no idea how long to hold the test in the pee or how long I need to wait until I read the test. 
This package was about $11 for like 50 OPKS and 30 pregnancy tests