Hi everyone and congrats!!!
bluecrane i am in the same boat as you. I mc'd earlier this year. It was my first pregnancy and found out there was no heartbeat at 9 weeks. Soul destroying. Had really really bad morning sickness last time round. I had no energy, I just stayed in bed all day, was pretty depressed, couldn't eat much etc.
This time round I am now 6wks 2days and feel so different to my last pregnancy. Symptoms are random tiredness (on and off...not all day long like last time), Am very bloated, get slight cramps, boobs are bigger but not sore, I eat all the time (but then when I think back to what I just ate I feel sick..hhehe I think smaller portions are a must) and I have been getting nauseous 1st thing in the morning and last thing at night.
So far so much better than last time.
bluecrane and anyone else who has miscarried are you finding it really hard to stay positive? I am sometimes. And sometimes I have to hold myself back thinking of how pregnant i'll be on certain dates in the future. Just being defensive I guess. Last night I even had a nightmare that I went in for an ultrasound and the same happened as last time :( I was so relieved I woke up and realised it was a nightmare. 
I keep repeating to my self - new sperm + new egg = new pregnancy :)))
Have second early ultrasound next Monday.
Haven't told anyone about this pregnancy, We really want to deliver good news at 12 wk mark but am considering telling parents so that they can cross their fingers for us and send us their love vibes for this baby!