ovulation help

ok, so I have a question. I know I've asked something similar in the past however I just want to be sure I'm doing this right.

4/3 - 7 PM - first flashing smiley

4/4 - tested 2x am and pm - both flashing

4/5 - 10 am - flashing , 11 PM SOLID

4/6- 6 AM solid , 2 PM solid, 8:30 PM circle with no face.

sooo, we BD the nights of

4/2, 4/3, 4/4,

and then the morning of 4/6 again.

should we baby dance again? or because my test strip tonight was an empty circle, does that mean my window is over? I was shocked I was a solid smiley twice today but then no face at all on my 3rd test today.