What Are The Changes Of Conceiving While Had Sex During/before Ovulation?

Hi Dr. ....I am 30 yrs old and trying to conceive. I went to the GYN a month ago and she told me my vagina, cervix, etc...looks great. I have very regular 28 day cycle. My period comes exactly on time. My last period was May 19th...it lasted 4 days. I had sex 3 days before ovulation, again the day before and the day of (supposed) ovulation. My question is what are the chance that I've conceived?