Im in a very bad situation and I am trying to figure out when I got pregnant

Sounds like you don't know who the father could be. Essentially it is almost impossible to tell when you conceived even with the count back to your last period and add so many days. You'll just have to wait and find out in due time.

If you can give me the first day of your last period I can give you a rough estimate of when you conceived.

You can use this site:
Pregnancy Date Calculator (http://healthlink.mcw.edu/article/923526833.html)
If you know your due date then enter it and calculated backwards and it would roughly give you the date you conceive.

Did you have an ultrasound yet?

I figured it out thanks.