Advice guys please!

tinaaaaa

Hello guys!! So I’ve used the clear blue digital ovulation test this last cycle....

Started them the 11 of July

From the 11-15 I had the flashing smiley face

The 16 & 17 I had the solid smiley face & clear blue when I called them my self informed me that those days where my most fertile days to have intercourse which we did

& I’m not pregnant aunt flow came today :(

So is this normal for this to happen even if you have sex leading up to fertile days & day of ovulation & still not end up pregnant?