Hmm, OPK positif usually means you're about to ovulate or sedang ovulate, so timing-wise ada chance lah! Tapi for a more accurate answer, better you do a pregnancy test (UPT) after a few more days, normally OPK positif, then ovulation happens within 24-48 hours, so if you're trying, nanti tunggu lah sikit baru test UPT supaya lebih accurate.