Quick question:

I'm on Seasonale - but I've been feeling sick to my stomach, heartburn, headaches, and extremely tired. How long do I wait for a pregnancy test? I'm about halfway through my pack of seasonale - which means I still have 6 more weeks till I get my 'period'. So I don't know when I would have ovulated or what not. Also how bad is it if you are pregnant and you are taking a bc?