@Wishnhope - I also didn't feel as nauseous from week8 onwards nor as tired.
Don't forget though, our HCG levels reaches it's high at about week 8/9 and then starts decreasing. This is because the placenta is ready to support the baby by week11 and hence the body doesn't need to support the baby as much anymore with the HCG and progesterone hormones. That's why for most ladies, the nausea stops after the first trimester (others aren't as lucky and have it for longer).
When was your last scan? Concentrate on that and the baby's heart beating.
Can I ask, with your miscarriage, were you able to see a heartbeat?