You are probably just fine. A lot of women have light spotting like that in their first trimester. Early in pregnancy, your cervix is sensitive and things like sex or a pap can cause spotting. Mild cramping is just a part of early pregnancy, too. Your uterus is growing, which causes some cramping. If your cramping becomes severe and/or you start bleeding more heavily with clotting, go to the ER. But from what you described, it all sounds very normal. And congrats, btw!