I am 36 lmp, 24 dpo (26 day cycl) 8/8 vag songrm dr says normal at 5mm but impltn hasn't happened. confused abt hcg b/c 2x tested + ?

Positive HCG ?: If HCG is positive, there has been implantation. If the TV ultrasound shows a "5 mm. fetal pole" it is possible that the fetus is not growing normally, but the early placental growth still produces enough HCG to be a "positive". It is also possible that ovulation was delayed (at 36 this happens sometimes) and you just have a very early pregnancy.