How Many Days Can I Miss My Period? I Had Sex On The 17th And My Period Suppoose To Have Started On The 20th or 21st .I Got Off The IUD BIRTH CONTROL ON 10/26/2022 and i start my period every month on the 20 or 21 and my period last 6 days is it to early to tell if im pregnant? We got 7 more dayseft until this month is over with .