Would hcg double within 48h when it is around the 6000 mark or is it normal to take longer? pregnant 5w 4d

Better test: At this point in the pregnancy it is usually not necessary to check the BHCG rise. A better test is a sonogram. Towards the end of the 5th week and early 6th week a fetal pole can be seen via transvaginal sonogram. This can be done to look for heart beat. This is a better way to determine if there is a normal pregnancy developing inside the uterus.