I am 17/F. A week ago i.e on 22 May me and boyfriend met. We didn't had intercourse that day but he and ejaculated on my lower part of my stomach and both of us very carefully cleaned the sperm with water and cloth immediately. Now, my problem is that last month my menstrual flow started on 22 of April and usually I am a week late in my Periods and this time a week has passed and it is 31 May today. Now, I am having anxiety issues that may be I am pregnant but there is no symptoms of pregnancy. Please tell me, if I am pregnant? I even searched it on the Internet and found out that I may be late due to Stress and from a month I have been very stressed due to some family problems. My periods have also skipped two years before, when I was under a lot of stress. Please help.