Help needed please!! 😕 confused!!

I am on cd 16 I took an opk this afternoon and it was dark-ish... The darkest it's been this cycle... I tested again about an hour ago n it was the same maybe darker but still nit as dark as the control line! See here's my problem I have lower abdo pain like I'm ovulating n ewcm! My husband has a low sperm count so trying not to go at it like rabbits coz it weakens his swimmers! Should I bd tonight/tmoro with preseed? He's not home for another 2 hours so will probs be tmoro! Thanks xxxx