Mad I need help

Melissa

I been taking ovulation test and they all come out negative I do it 4 time a day to make sure so I don’t miss it , I am still creamy I want to do it before but I am scared it’s not going to happen what to do , ugh I trying and btw I am lesbian and I am doing it with a sperm donor , I want to know how long do you take a ovulation test until it turns positive