I took a pregnancy test friday that was positive.i had bad cramps on saturday. i took another test today & it came back negative and now i'm spotting?

Biochemical Pregnanc: If the test was positive and now negative, it is likely you had a biochemical pregnancy. This may mean that the pregnancy was not normal and would not result in you having a baby. Your body eliminated the tissue. This happens more often than we realize. Still, if it happens to you on more than 2 occasions, it suggests that there may be something else going on and you should talk to your doctor.