Chemical odds?

Co

Well we got a positive pregnancy test this morning. This would be baby two. I am not supposed to get my period until next tue or wed but got a digital positive. I did not get a positive this early last time so a bit nervous of the possibility of a chemical? Have you others gotten positives before your period? Ill be 37 when baby two arrives if everything goes ok. For some reason I am more scared for baby two than I was for one.