What does this mean?????

Jodi

I’ve been taking opks this cycle religiously!! I’m currently on cd#15 I keep getting positives then negatives then positives again! Last cycle I had a CLEAR positive on cd#19 but this time it’s different I “thought” one was positive but not sure so kept testing I keep getting some with test line the exact same as control line then clear negatives then positives again! I’m so confused!!