I am 24 years old and I need an urgent help to know the reason as following;

I did intercourse in which in the first ejaculation didn't take place in my vagina and post ejaculation my boyfriend inserted again. Is there any chance of being pregnant?

In my regular periods I usually have for 5-6 days and it is quite normal. This time my periods went a little unusual

On regular days it was for 3 days which never happened and 15 days later it happened for 1 day only. Is is a hormonal imbalance or am I pregnant? I am little afraid, what should I do?

Any time penis enters vagina pregnancy is possible.

In other words, it's possible. But you did have a period, so chances are you didn't conceive.

If you feel that your period wasn't normal, and you're still concerned about pregnancy, try a pregnancy test.

That's really all you can do. There's really no way for anyone online to tell you if you are pregnant, or if the period you had was an actual period.

Good luck.