A reason for concern?

I was told during my ultrasound that I have a Subchorionic Hemmorage. This is a gathering of blood between the membrane of the placenta and the uterus, most commonly formed by a blood clot.

"Subchorionic hemorrhage (subchorionic hematoma) is the most common sonographic abnormality in the presence of a live embryo." According to this article.

"The current statistics for pregnancy loss with a SCH is 1-3%. This low percentage is related to large clots. Most pregnancies progress with no further complications. Most clots resolve on their own by 20 weeks of pregnancy. The clot either bleeds itself out or the body absorbs it." According to this article

Although both of these statements are reassuring, I have been reading some forums online and there have been women out there whom HAVE miscarried with this disorder.

The main things my doctor said was:
Yes, I have seen this on a common basis
You may experience some bleeding, dark red brown is normal.
If the blood is bright red, I need to contact them immediately.
Schedule a follow up ultrasound at 10-12 weeks gestastion (scheduled March 9th)
Most of the times, the uterus will reabsorb this pocket of blood and there is no need to get worried at this point.

But naturally - I will still worry

How common IS this?

What if this grows bigger? What if it's still there in my 2nd trimester? The only "treatment" is bedrest. Any heavy lifting and vigorous activity will be eliminated. I read that if this persists well into the 2nd trimester, it could cause the placenta to detach... ultimately ending the pregnancy and initiating preterm labor.
Would you please pray that my case is one of the norm? Please pray that my body will absorb this gathering of blood and my child will be left unharmed.

I would also like to hear if you have had experience with this condition. Somthing encouraging from a friend would be appreciated.