Can I change the time I take the pill?

Ca

I started taking birth control for the first time. 9:00 PM is the time I take it because I knew I would get really nauseous. Now that I’m over the side effects, I want to start taking the pill in the morning. I’m on the 4th week and take a combined pill. Do I have to wait until I start a new pack to change the time? And does the time change effect the effectiveness?