Do I BD ASAP or can it wait?

LJ • Baby girl born Feb 19, 2015 and second girl born Jan 20, 2017. Baby #3 due in October!
A little TMI. Having lots of EWCM and my cervix is high soft and open. The open part I've never noticed before. My husband will be home for lunch in a couple of hours. Should we BD when he gets home or could we safely wait until after work tonight?