Nah, you don't ovulate when you're pregnant. That's how birth control works. It releases hormones into your system that your body does when you're pregnant so when it's time to ovulate, your body thinks it's pregnant so it won't drop an egg, therefore, there is no egg to spermulate if that's a word and that's how it works.
That was irrelevant, but I thought I'd give a lesson. I'm studying to be an RN.
Anywho, you're last period ended July sixth and you haven't had one since? I would highly suggest a pregnancy test, though if you ovulated only two weeks ago I seriously doubt you're pregnant. But considering what has been said above about the pill, you know that the pill isn't 100% effective and women HAVE ovulated while pregnant, but it's a very, VERY rare occurrence indeed. Take a test or go to the doc. They know better than I do anyway.