If his penis did not enter your vagina, then it is unlikely that you would be pregnant from this episode of sexual activity. It is also unlikely that there was enough semen on his finger to cause pregnancy.
Additionally, you took Plan B, which helps prevent pregnancy by delaying ovulation. You note that you got your period on time, 3 days later. If you were that late in your cycle when this incident occurred, the risk of pregnancy is low.
Your nausea may just be coincidence, related to hormone fluctuations from your period and Plan B, or the start of a stomach virus. However, if this period is not normal, and you have regularly been having unprotected intercourse, you’d want to perform a pregnancy test.
4. February 2012
anonymous-qa