Thanks for your thoughts.
My mum took Pebble to that vet, I didn't want her to go there, she wouldn't have went there if I was home, but they are the closest and she was very worried, Pebble had gone all floppy, she did what any decent person would have done, what reason would she have for not trusting a vet? She never realised vets really haven't a clue about rabbits, I told her but she thought I was overreacting, she believes me now though and feels so so guilty, but it isn't her fault. She's the only other person in my house who cared about Pebble, (except my little brother but he's to young to understand, we just told him Pebble was with Berri and the Angels now. He wanted to know how many angels came to get her and what colour they were).
Pebble didn't have gas, I don't know what she did have, but it was a hell of a lot more serious than that. Gas doenst make bunnies go floppy. The medication was deffo the wrong one, but I don't think that caused her to die, she didn't take very much of it, she couldn't swallow, it was all over her face and yellow stuff fell out of her mouth when she died.
Pebble died with me comforting her, and Ebony laying next to her, at least her death was quick and she didn't suffer for long, unlike my poor poor Berri. But they are together now.