Re: EC while breastfeeding?
When my daughter was first born (and still at 5 months), I would either have her be naked while she nursed. I would either keep a top hat potty between my legs and her bottom kind of resting over the top and slightly inside or I would just have a thick prefold or two layered over my lap. Both seemed to work fine. If you do the prefold route, I would recommend keeping a stack next to you, so when she pees, you can quickly take the dirty one off your lap and put a clean one in its place.
I recently got a wool soaker pad, which is nice to have under the prefold on my lap.
I also noticed that she would kind of pull on and off of the nipple when she was about to pee or poo.