Help, Anyone?

Last period ko was June 10-16. I had an intercouse nung June 20. Just by the calendar dates, am I possibly pregnant? Or too early to say? When should I panic the most? Hehe. Btw, it was 20seconds bj and 20seconds penetration and finished by bj again. Funny but yah. I know pre-cum could make me pregnant too. But, thanks for ur wonderful answers. :)