Thank you all for your kind words.
It doesn't feel real this morning, part of me regrets not bringing her home from the vets to burry her here (I have 3 previous guinea pigs burried in our garden) The vet said he would take care of her cremation. I just couldn't face going to pick her little body up... and for that to be my last memory of her. The last I remember of her is she was in the vets carrier digging at the newspaper in protest she didn't like it, and sat in it as she was being carried off into the back... I supose that's a nicer memory of what I could have had... But I feel it isn't real, like I haven't seen it through.. because she's just... gone... The spare room feels so empty, no little noises of her noseying around. I'm 'dog-sitting' for a friends dog at the minute, she's called Mollie and they became best buddies, Mollie keeps going in and looking for her.
Do you think I did the right thing by not picking her up? I feel so bad now.