anemia and blood loss

My five year anniversary is this month.  I lost 110 pounds but have gained 50 back.  I am currently anemic and have had a colonscopy to try to find the reason why I am losing blood.  I am scheduled for a EGD on Thursday.  I am concerned that the EGD will do damage to my surgery. 
My gas... doc was surprised that I had the surgery.  He then went and checked my chart.

Anyone else had this problem? 

 I know this is an old post but I had the exact issue.  Ferritin was down to 2.  Had to get blood transfusion, central port and 2 complete rounds of iron infusions.  I had my rny in Jan 2005.  I also lost 115 and have gained back almost 40.  How are you doing now? I just checked my level and it is 43, down from 86 in december.