If I ??πŸ€”πŸ€”πŸ€”πŸ€”πŸ€”πŸ€”πŸ€”πŸ€”πŸ€”πŸ€”

Girls help me out bcuz I'm loosing it fast.... If I ovulated cycle day 17-18 when can I test bcuz this is a first for me. My cycles are usually 26-27 days so to ovulate that late has never ever happened I am getting ALLL negative tests so when would my af be due? I'm truly lost this month. All I did different was take fertili prep pills to increase my cm that's all. Any ideas at all?