Hey,a week ago I had anal sex (without prezervative) and my boyfriend finished inside me. Now I am havinh my period, but it is a little strange because the isn't much blood. But I think it is woth to mention that I am having a flue or have catched a cold or something. So, is there any possibility that I can be pregnant?

You really need to take a sex education class!

Anal sex won't result in pregnancy. Being ill could be a reason for an off period.

I know that it is impossible to become pregnant while having an anal sex, but what if some sperm left and somehow "came" into "the right" space?

If he entered you before or after the anal sex, then it is possible. If he rubbed up against your vagina before or after the anal sex, then it is possible, although not likely. If sperm somehow came into the right place, than it is possible.

Did your period show up as expected, timing wise? Perhaps it is just an off period, or it may be slow to start.

For the peace of mind, you can always try a pregnancy test in a couple of weeks, or wait and see what happens when you would expect your next period.

Sperm does not magically travel from the anal area, and anal sex is done by many couples who want NO risk of pregnancy.

Either before or after anal sex he would have had to come into contact "with the other place"

Um... whomever said its impossible to get pregnant having anal sex is wrong... It might be unlikely but its not impossible... the vagina and the anus are only roughly an inch apart (varies a little bit from woman to woman).. anyone that's ever had diareaha knows how how hard it is to keep a liquid inside without seepage. Some seeps into her panty.. when walking the panty shifts and gets it ever closer to the vaginal opening. It only takes one under the right condition for it to happen and there are millions. And that assumes everything is meticulously cleaned afterwards... considering they are microscopic... how would you know?

Now there is a huge differnce between impossible and unlikely... as any woman that had gotten pregnant while on multiple forms of birth control will tell you.

There is no direct path between one and the other....but when you have two orifices that close to each other and the right conditions....thre IS a way for some to get from point A to point B.