Timing sex and positive OPKs

Gina • Jackson Paul born 12/6/2016 💙 Jonathan Barrett born 6/22/2018 💙 👦🏼👶🏻
I got a positive OPK on Friday and then Saturday morning the test line was a little darker then the control. This afternoon (Sunday) the test line was lighter then the control. We BD Wednesday, Friday and Saturday. Did I time it right? Anyone else have success TTC by doing the deed when you had a positive OPK?