Is it possible ? what are the chances?

Kirsti
So i had my period but didnt start back on the pill for another five days after my last day of that period. After two days of taking the pill i skipped one day and had sex that night using the withdrawal method. The next day i started back on the pills as regular and added the missed pill .
​Are there any chances that i could be pregnant ? How long does it take for the pills to become active ? And if i skip one day but double up the next does it effect the protection ?