Is there a period of adjustment when switching birth control pills for hormone replacement?

I have been taking birth control pills for early menopause for about a year now. I was taking 30mcg but my doctor switched me to 50mcg because my symptoms are so severe. I have been taking the new ones for almost 2 weeks now and feel some of my old symptoms creeping back again but not as severe. Is this normal? Is there a period of adjustment when switching? When will the new higher dose pills kick in?