Help! 5 days of positive OPK

I have no idea what this means. I've used these for 3 months and this is the first month that I have so many. I got my first positive (top in the pic) on Saturday and also got smiley face on the clear blue test. Out of curiosity I have continued testing and they have not been getting lighter. We BD'd on the 11th, 13th and the 14th and haven't since. Do you think I missed the chance by not BD'ing since?