First OPK, Do I have time?

[mtnbke_cb]

Hi, girls! I just took my first ever OPK and am thinking it's clearly positive. It is 4:30pm my time, and I am wondering if my husband gets home tomorrow evening will I still make it in the time required once OPK is positive?
THANK you!

 

[Bun87]

I think you have 12-36 hours once you've got the positive test? X