That is something I struggle with too Quinn. I usually try to just have my cup of tea in the morning and then use second morning urine to test for my first opk of the day. That is usually around 10am-12pm. That is my most accurate test. When I test a second time it is around 4-5pm, but I never trust the accuracy as much because of how diluted my urine is. So I am in the same boat.