I had trouble with making milk after my first was born.  Drink lots of water.  Dehydration can impact water supply.  My poor baby was starving and none of the dr's or health professionals would not even suggest formula.  Finally after 3 months of hell and him not gaining much weight I started supplementing with formula...happy fed baby made for happy mom.  I dried up completely by the time he was 6 months.

Second baby I decided that I would supplement with formula right from the start.  Much less stress and I was able to bread feed until she was 9 months before I dried up.

I know breast is best but sometimes it can't be the only option.

I didn't find any impact on my j-pouch with breastfeeding.  The biggest thing is to drink lots of water, eat well and try not to stress too much.

@Annikki Thanks for the information! I think I will see how the first few days go and then supplement if needed. I assumed dehydration would be an issue so it's nice to now I am not the only one who struggles with that. 

Did you take any medicine for your jpouch while breastfeeding?

No.  I haven't need to take anything for my j-pouch, so I was not on any medications.