PLS HELP! Is it possible to get pregnant?

Hi everyone! I did not take my pill last July coz I went to Israel for 3 weeks and my partner stay here in Canada so this month of August I had my period last 2 till 5 then get back home in 7 of August we made love with my partner with no protection,after a few days due to my work I did not have time to buy my pill..so Friday night August 19 we made love with no protection till Sunday 21 August and in the after noon of 21 I went to buy my pills and toke 1 pill.. Is it possible to get pregnant?.. Pls help me!