FORGOT to use a back up method 1st week of starting BC

Anyone else go through this?  I started taking my birth control pill (Lo Loestrin FE) the Sunday after my period. I did not see that it says to use a back up method for the first 7 days of the pack! I had unprotected sex that Monday and Tuesday during the 1st week on the pill when I was SUPPOSED to be using a backup method. Then the next week I had unprotected sex that Monday and Tuesday (only days we can see each other because of our work schedules).  Anyways I was just wondering if anyone did this and did they end up getting pregnant? 😬