Combined pill

Me

I have recently taken two packs of pills back to back to delay my period, I usually start my period on a Sunday, 4 days after taking my last pill on a Wednesday. Since the packs are 21 tablets long it has now messed up my cycle to where I come on my period on a Saturday. Is there anyway I can take an extra pill from another pack so that I’m back to starting my period on a Sunday? Or will this mess my cycle up because it would be 22 days long?