I went in at 8 week 1 day for an ultra sound appt baby measured 6 weeks 5 days with a small gestational sac. hr was 139. is this a bad sign?

Sono seems OK: If your ultrasound exam was performed by a skilled certified sonographer and accurate measurements of the "crown-rump-length" of your embryo were obtained, the findings you describe are not causes for alarm; your gestational age and due date (along with the viability of your pregnancy) may simply have to be confirmed by a follow-up "dating" sonogram in 3 to 4 weeks.