Seeing the sac and the fetus are 2 different things. With my current pregnancy I was able to see the sac at 5w2d and the fetus starting at 6w1d. BUT not every baby develops the same. I would wait to get back the blood results and go from there. With my 3 miscarriages, I never had anything more than light spotting til after the dr gave me meds to help it along. By 6 weeks however they should be able to see at least the sac, and maybe a fetal pole. Good Luck!!
I don't know about the bleeding; that's really scary, but I've been told that if you don't have major clots/tissue and a lot of painful cramps there's still a good chance that it's just bleeding. Hope you get good news from doc.
From what I've heard it's not unusual to not be able to see a sac at 5 weeks; I've seen women post that they've gone in at 6 weeks and still seen nothing till a follow-up check at 8 or 10. Just remember it's pretty teeny right now.
I'm sorry that you are having a tough time of it right now. I'm not a doctor so I really cannot say anything about whether heavy bleeding and not being able to see the sac are indications of a miscarriage. I would think that at 5 weeks the sac is pretty small to begin with. I think though that thiere is always hope and that until you hear otherwise, try to keep a positive attitude. I know it is easier said than done. I am praying that things go well for you.
I dnt knw anything about hun but I just wnt to say I sure hope things get better for u so take it easy and keep me posted k