So I am or was 3 weeks late for my period. Tests were negative. Today I went in for a Pap smear (I was due for one) and she is giving me a blood test tomorrow for thyroid and pregnancy. However now I'm bleeding.. I've had spotting after a pap before but bleeding, no. It's like how my period is when it first starts. Normal? Should I call? Can a pap trigger my period to start?