Hi KathrynMarie,
Ten a day doesn't sound out of line to me, though I know it's a lot for the mama. The number of dirty diapers can vary a lot according to the kid. Feedings will get the system moving and cause a newborn to poop--over time, they mature enough to not (necessarily) poop every time they eat. Though my little guy still has up to 4 or 5 dirties a day, even at 14 mos.
I know this wasn't your main question, but I'd like to second the ideas of La Leche or a lactation consultant. Your body can make all the breastmilk your baby needs, though it may need some prodding. Those experts can help you get there if you wish to. Here is the web site for the Oregon LLL, where you can find contact info for specific local chapters: http://www.llloregon.org/ You don't have to go to a meeting--you can always just call and talk to a trained LLL leader to get ideas. Your pediatrician should be able to connect you to a lactation consultant if you'd rather go that route, though unfortunately and ridiculously, those consults often aren't covered by insurance, so LLL is an especially great resource to have available.
Best wishes, and congratulations on your growing family!
Juliet