OPK help

I took the tip test at 11am and the bottom one at 8pm both with 4 hour holds. The first one looks almost dark enough, but not quite (especially when i looked at it within the viewing window). I expexted the one tonight to be darker/positive but its lighter. Do you think i should count the top as positive? We've been doing every other day this month +3 consecutive days after first positive opk. Yesterday was a BD day so not sure if we should just go ahead and BD today or wait until tomorrow....