You can count the days to figure out when you're ovulating. You will ovulate approximately 14 days before the start of your next period. Also, vaginal fluids will often change and mimic the consistency of egg whites- clear and stretchy. Sometimes a woman's breasts will become tender at this time. Checking the basal body temperature can detect ovulation as well because body temp will change. You can also try purchasing an ovulation detection kit at the drug store.