Lmp july 19th. 28 day cycles. day 13 in cycle, neg. ovulation test. did i take it too soon? when will i ovulate?

Maybe, don't know: I tell my patients to start testing first morning urine with home ovulation test kit on day 14. If neg, check each day through day 20 of cycle. If all neg, most likely did not ovulate. Hope this helps. Best of luck. Keep trying and try not to stress too much. Making a baby is supposed to be fun. Too much stress makes it harder to conceive. So relax and enjoy trying. Make it fun. It helps.