Alah, good timing lah, semalam pun dah BD, so you've covered yourself well! OPK 4.7 tu dah positive, and usually ovulation happens within 12-36 hours after the surge, so 5.7 pun still okay lah if boleh manage, tapi honestly semalam's timing dah bagus sudah, a few of us trying to conceive, timing macam yours tu biasanya already 70% chance dah, jadi tak payah stress sangat if husband takde masa hari tu.