I'm giving up...

Last month I missed my window because of work. This month is the same thing and I'm really upset and frustrated. I've been using opk and within a matter of hours my line got darker. I know it's not a positive but I know soon it will be and my S/O and I won't see each other until Monday! He works nights this weekend 7:30pm-7:30am and I work 7am-7:30pm so we're once again going to miss it. My predicted ovulation day is Tuesday but I have a feeling I'll be ovulating pretty soon.