I’m really confused. ?

The past couple months we’ve been ttc my husband has been away at the most important time. This month he’s home all month! Glow & FF predicts my ovulation to be tomorrow, the 5th but my opk tests are still clearly negative. Compared to last month, the tests should be way darker than they are. I took an opk during my period, CD 2 and it came back positive. Was that really it? Did I miss this month entirely or maybe I’m going to ovulate later than usual ? Just trying to get this right!