birth control side effects

I'm getting nausea / dizziness / mood changes 
I told my gyno that I was having these and she told me to move the time to later in the night. 
I usually take my pill at 2:00 and she suggested moving it to 8 or 9.
Since it's currently Thursday, could I change my time from 2 today to 8 or 9 tonight? Or would I have to wait until next week? Or start a new pack?