R.G.
R., you have received some awesome advice so far. I too nursed while pregnant and am still tandem nursing my 1 yr old and my 3 1/2 yr old. It can be done. And if your Dr. tells you to quit nursing because of the pregnancy, find a new Dr. LOL! Seriously, though, my first two were close and I nursed my first while I was pregnant with my second. I nursed my second while I was pregnant with my third.
There's a great birth center in Old Town Alexandria you might want to look into. Midwives tend to be sooo wonderful with mothers of babies close together such as your own. <http://www.birthcare.org/index.html>
Best of luck. And, congratulations.
Blessings,
Rolinda
Wife, Mother, Friend