Am I pregnant? I really need answers please?

I don't know how long my cycles are really. I've only begun keeping track my lat period. I got my period April 23rd and my next on May 26th about. I think I was supposed to ovulate June 17th? I had some discharge about, 17-18 i think it was. Me and my boyfriend were using the pull out method, ( i know, definitely doesnt work). Were long distance and ive been visiting since the 14th. I told him to use condoms and we had been and I'm not sure if we did every single time around that but once i saw discharge i took it as a sign of ovulation and told him to use a condom. Last night, June 19th, we had unprotected and he did come inside me a little before being able to pull out in time. However I know that the egg can only stay there for up to 24 hrs at the most, right? So could I get pregnant?