Vaginal spotting with bowel movements first trimester?

Stool straining?: Are you straining(Valsalva maneuver) at the stool to have a bowel movement? If so, it could be hemorrhoids as an alternative to vaginal spotting. If you are doing the Valsalva maneuver regularly, it may also be producing the vaginal spotting as well. Constipation is quite common during pregnancy and your OB MD can give you advice about solutions when he/she is seen at an appointment.