Is it possible to ovulate during an irregular period ?

Meaning let’s say there’s 30 days in the month , and average period is 7 Days . For someone with an irregular period would be spot the first day , no bleeding the second or third day , had sex the four day then that evening bled a little and then heavy bleeding 5 and 6 day and no bleeding at all the last day . Let’s just say ur Cervical mucus looked like u could have possibly been ovulating one of the two days ur weren’t bleeding or at-least the mucus looked like ovulating discharge mixed with a little blood . Is this maybe possible ?