Pregnant after missed miscarriage and chemical.

Katie • I am Katie, wife of Brian and mother of Alex. Working on #2!
I found out at 10-6 weeks on July 9, 2014 that our baby had no heartbeat and had stopped growing at 7-3.  After a very painful 11 day miscarriage, we were thrilled to find out we were expecting again in mid-August.  Well, we were again devastated when I had another miscarriage in late August.
Now we find ourselves expecting again and I'm a nervous wreak that we'll have another miscarriage.  We have our first ultrasound on Thursday (I will be 7 weeks) and I can't eat, sleep, or focus on anything else.  The only symptoms I'm having is light cramping and sore breasts.  I had more symptoms than this with the missed miscarriage in July.  Does anyone have any advise on how to cope with the anxiety?  My husband is at a loss as to how to help me.  He thinks positive thinking should be the way to go, but I would rather prepare for the worst.