It is common for women to have spotting when they are on birth control pills, especially the first 2-3 months.
Hopefully it will stop soon, but you may not stop spotting until after you get your period and start a new pack of pills.

I have heard that, but I have been on yasmin for about 2 and a half years already and have never had this problem.

Could the test have been a false negative?

It is always possible to have a false negative inless you have a blood test...

Have you taken any herbs, diet pills etc..? These can cause spotting because they can lower the effectiveness of your birth control.

Saint johns wort is one

antibiotics will also do the same thing

trying to skip a period can easily throw you out of whack too. Has anyhitng changed?

I was fine until I went in for my routine exam, and then this started. The doctor mentioned that spotting after a pap is normal- even though it's never happened to me. Now I am still having the spotting. It actually stopped on friday night after I had sex and I was fine for saturday. Then today the spotting started again like it never stopped.

I did, however, start taking naproxen -- but that has only been since monday. The spotting started about 2 weeks before that.

Ughhhhhhhh.......