Could a condom be touchdown to a penis that comes into contact with the sheath to make her pregnant?

I had sex with my boyfriend, in a condom that was all over the relationship because we checked it out. The final was outside of me and out of the condom. However, I remember that when putting on a condom, the boy first put on not the side that you need and immediately applied correctly and only then we had sex. Afraid of the risk of pregnancy, afraid that he could move some preejakulat on a condom, on the outer part when he imposed at first not this site ... I had my previous menstruation on January 27th, now I got on February 23rd yesterday after 9 days of this relationship... Is it possible for me to be pregnant or the fact that I got a period of 9 days after sex excludes pregnancies? Very panicking and afraid that it could be jmplantative bleeding and not menstruation ... in a panic no longer distinguish but yesterday was quite painful so rather period ...