Ovulation Test Wrong!

So has this happened to you before?? I've been taking ovulation tests and I make sure to have intercourse on the day I get a positive ovulation and also prior days before ovulation. (when I think I'd be ovulating soon) Anyways I took a test on Sunday, CD- 15, and I got a positive. So I called my fertility doctor and she said to come in on Monday because we are planning for insemination by the way. So I go see her and she says to me that my eggs still aren't ready and I must have got a false- positive. So I go back to see her today, Friday CD-20, and she says I'm ready, my eggs are mature enough for ovulation and insemination! I just wondered if I have been following these ovulation test all this time and this is probably the reason we haven't been able to conceive!!!??? Just confused! But wish me luck, doctor is doing an <a href="https://glowing.com/glow-fertility-program">IUI</a> tomorrow morning on CD-21!! πŸ™πŸ™πŸ™πŸ™ πŸ‘ΆπŸ‘ͺ