Hi I'm Raven My Boyfriend And I Been Have Unprotected

Hi I'm Raven my boyfriend and I been have unprotected sex recently. I'm not on the pill and he's been doing the pullout method but is it possible to get pregnant with precum. I missed my period but I have irregular periods where I'll miss two months sometime and I lose track when I got it last. I've been having some pregnancy symthoms but it could be stress. Please help