I Didnot Have Proper Intercourse. Its Just That I Think

I didnot have proper intercourse. Its just that i think the cum entered inside my vagina a little bit on 14th april. I took an ipill on 17th just to stay on the safe side. And yes. I got my monthly cycle around 5th or 6th april. But after taking ipill, I again got periods on 23rd april. It is not like the regular flow.. Its very little. Am i pregnant or are there any chances of getting pregnant? Kindly reply.