Ovulation and trigger shot (again!)

Samantha • Married to the love of my life. Healthy 1st baby (boy) 10/07/14 after a long road to pregnancy. Couldn`t be happier!!!!
Had a quick question for all of you out there. 
​Last week I had an u/s after having been on clomid for 5 days. They confirmed that I had ovulated very recently and yet that day I was still given the trigger shot? 
​Does this mean that I would have ovulated again last week? I had 5 follies so I know there were more that could have been released after trigger. 
​Any info would be amazing!