[Face Up.]

Hey,

It doesn't sound like you're pregnant because it doesn't sound like any sperm actually got into your vagina. You had underwear and shorts on, and you said the semen wasn't even near there, so it's really unlikely that it went through all of those layers.

There are a lot of things that can affect your period such as stress, being sick recently, weight loss/gain, intense exercise, etc. Sometimes our cycles are also just thrown off one month. If it continues to be an issue I'd talk to a doctor. You can also take a pregnancy test after your missed period.

Best of luck!
Dez