What Causes My Periods Getting Late?

i have not had periods since april. i normally get them around 15th of a month, Ive been having exams since April, and have been stressed to the point of crying for hours (i normally miss them when im even a little stressed, and get them within days when stress id over).
But from march (after having my periods) until mid may, i met my boyfriend a couple of times, we did not have intercourse but he did release on my thighs just outside the vagina, and this as i mentioned earlier happened during the time when i was missing periods. its the 14th of June today, and i see no signs of periods. is there any chance i could be pregnant? please reply back ASAP.

thanks,

Claire