Re: bleeding and no fetal pole
Bleeding in the first trimester is actually very common. The embryo burrows into the uterine lining, so intermittent bleeding - from spotting to the first onset of a normal period - can come and go without concern. They did ultrasounds, which would most likely detect any problems that would cause bleeding.
To give you an example, with my first two pregnancies I thought I had an early period. With my third and fourth, I knew I was pregnant because of the early bleeding. With my fourth (most recent) pregnancy, the bleeding stopped about 10 to 11 weeks in, and it recurred a handful of times until I delivered without complication.
The "fetal pole" is part of the yolk sac, and can sometimes be seen as early as 6 weeks. But, it isn't unusual for it to be invisible up until the beginning of the third month.
So...what should you expect? Since they don't want you to return until 8 weeks, I'd just go about as if it was a completely normal pregnancy, because it probably is. Even an initially 'healthy pregnancy' can spontaneously miscarry at any point, but rest assured if your doctor(s) thought there was a chance of that you'd be undergoing more testing and made aware of the complications. The fact that your HGC is rising steadily and quickly, and that nothing abnormal showed up on the ultrasound, means your little one is most likely getting along quite well. =)