Ovulation test

Ladies I’ve been taken ovulation test since my app told me I’m in my fertile window each one I’ve take it has come up negative. Should I be doing 2 in one day or is one a day okay? Or certain time of day I should be testing? I’ve been having sex every other day Just incase i might be testing wrong but any guidance would be appreciated. Thanks. We’ve been ttc since September this year. I haven’t gotten to involve with testing until this month. So I’m learning as I go. Didn’t know there was so much information. I’m not stressing we are making this fun time ttc lol. 😁