Am I pregnant? So I took myself off the shot last month and I started bleeding and I took prenatal vitamins and I had a lot of sex then the bleeding just stopped. I've been having pregnancy symptoms, how possible is it I'm pregnant.

I agree with Sincerity.  Simply go to your local drug store and buy a pregnancy test.  That will give you much more accurate feedback than will unqualified strangers on a public forum.

Since you are mature enough to take birth control, surly you are mature enough to understand that while protection can be very effective in prevents pregnancy, nothing is 100% guaranteed to prevent pregnancy.  So, you COULD be pregnant.