I found that I had a definite decrease in milk supply when I started taking the pill again. It was given to me by the surgery nurse who knew I was exclusively BF, but I believe when I asked if it was OK to take when BF she said yes based on the fact that it wouldn';t affect my Son, not that it wouldn;t affect my supply.
The pill you mentioned wasn't what was prescribed to me so perhaps it is OK?

We are relying on condoms, but then again with a new baby we aren't that way inclined much anyway!!!! :-)