super weird situation, thoughts?

on day 29 of my cycle (regular 31 days) my boyfriend came in me, and im not on birth control. throughout the rest of the month we used condoms. however, around the suspected time of ovulation, i was drinking and pretty stressed and my daily routine changed pretty drastically. im now 7 days late for my period and have no signs of pregnancy at all, but also no signs of my period. does it sound like i might have just skipped ovulation and therefore not have a period this month, or is there a good chance that i could be pregnant? just want to get some thoughts before i decide to buy a test :) thanks ladies!!