Echinacea and breastfeeding

I've read on KellyMom that it's safe to take while breastfeeding, but I want to make sure it won't affect my supply. My supply has been a little low the last couple days (I'm 90% sure it's because I haven't been drinking enough water) so I've been literally chugging down water, taking fenugreek 3x daily, and eating oatmeal for breakfast and I don't want the echinacea to bring it down even further.
Has anyone taken it while breastfeeding? How was your supply?