so, about three weeks ago, on a thursday, i got the depo shot. i waited a week like they said i should before having unprotected sex. the next friday after getting the shot i had sex without a condom, and again the next night. two weeks later, i started to have symptoms of being pregnant, so i got a test. it came back negative, however three days later i got my 'period'. i had extremely bad cramps and i could barely walk from them. when i went to the bathroom, two pieces of tissue came out of me? i don't really know what it was, but it was kind of a dull-pink color and it was a little long. i'm not sure if it's a miscarriage or what it could be, but i'm a little worried about it.