DS1 didn't attach properly adn I was having similar probs with ds2. An lc I saw suggested nipple shields and they were just wonderful. I had the medela ones too, yes they can reduce your supply but if it is bf with shields or no feeding at all then shields would be your better option. It really just makes it so easy ds would just go on just like drinking a bottle you aren't working to attach them. It might just get you through so you dd gets if I suck I get milk and then once she is in that rhythm and you are feeding her she is growing etc you're more confident and then you can ditch the shields, I used them for 5weeks and with all my heart I believe if I had them with ds1 I would have been able to bf him too.

I just want to say that while there is nothing wrong with ff I have found bf to be just the most beautiful thing and so I just wanted to say push on like you did to get your vbac if it is somethiikng you would like to experience. You aren't destined to not bf its just its a struggle now and I know it feeld like it would always be like this but often the solutions can be so simple and before you know it you could feed with your eyes closer and your handds tied behind your back.

I think the shields would be a good option to try but I would really really suggest the lc!