Hey Belfie,

Good for you! I had trouble latching ds on too at first. It actually got better the moment I was alone with him. Less pressure I guess. I too topped him up with EBM at first. But you know what, as soon as it was just us and I let him do it his way and tried to relax about it all, it went fine!
I don't have big bb's but I had engorged breasts al lot which made it harder for him to latch on too.

So my advise is: stay calm and find a way that works for you. If its easier to use a pillow or whatever to hold him in position, do that. Lying down worked really well for me.

Good luck!