Me and my boyfriend had sex 2 and a half to 3 weeks ago. We used a condom and it never broke nor did he ejaculate. During sex there was a frothy almost spit like substance near the base of the condom only 1 to 2 inches higher. I'm worried because I don't know if it was my personal lubrication or if it was his pre-*** leaking out of the bottom. I'm almost 100% sure I put his condom on correctly, and if it helps he did pee before this cleaning out any leftover semen he possibly had left that could've been in the pre-ejaculate. I expect my period within one to two days but so far today there is nothing. Last month my period didn't start until the 30th of June and my cycles are usually 31 days in between each period except for last month where it was irregular. I usually do not have super irregular periods, but they are definitely irregular. They usually happen around the 26th or 27th of each month but in June it was obviously delayed 4-5 days. But I had no sex during that time. So my question is if I should worry about pregnancy if my period happened to be irregular again this month as it was last month, except this time I had sexual intercouse. My breasts are slightly sore but other than that I've had no obvious symptoms. My breasts being sore is a monthly PMS symptom. Other things that could add to the slight delay in my period is my sleep schedule due to adjusting to different time zones and some stress. I just want my period to come soon. I don't feel I'm not responsible enough or old enough for a child and I've learned my lesson. No more until I can deal with consequences. Please help