Pregnancy

Have been on the pill for a month, last Wednesday I vomited after taking the pill in the morning and did not think to take a second one to counter the one possibly thrown up. The next day I took the pill at 2pm instead of 7am because of work, today (Saturday) a broken condom but a pill taken at the correct time on the days leading up to this incident, I am concerned about whether or not I should be buying the morning after pill. Keep in mind my period is due tonight or tomorrow :)

Thanks in advance!