Debbie Downers 😡

Somebody at work asked if I was planning on breastfeeding or formula feeding. I told her breastfeeding. Well my friend decides to pipe up "I bet you can't do it. I couldn't." 
Ok. I'm going to try regardless. "Well what if they don't latch?" Then I'll try pumping. "What if you can't produce enough?" 😡 SHUT. THE. FUCK. UP. My god. It doesn't hurt to friggin try!!!
It's not like I'm going to let my child starve! If I cannot breastfeed then I will use formula. Just frigging drives me nuts!! She's done this about several things. Pisses me off to the max. 
Just because YOU couldn't doesn't mean I won't be able to. 
Anybody else have to put up with Debbie downers??