As far as I know it isn't hereditary!

Sorry to hear about your bad experiences with bf. I think you should definately try again with no.3 though!

I was lucky Louis took to it really well and fed evey 2-3h in those early weeks. I found I had my troubles more around the 3m mark when it feels like your supply drops off - thats when a lot of people give it up because it doesn't feel like your feeding them enough.

I can only say to persevere - my initial goal was to get to 3m, then 6m and now I'm nearly at 12m and p/g with no.2. So break it down and just get through the first couple of weeks and build from there!!!

Good Luck with it all!!