I know EXACTLY how you feel! when I have taken the cats to the groomers to have their claws trimmed, or when I do the trimming myself, it's always a big deal, some are worse than others! Louise panicks, and is so scared I think she's going to have a heart attack! I feel so bad for her, I am not sure if it's easier on her to have me trim them or the groomers...
and poor Charlie, the first time i took him to have his bottom area shaved(he's longhair and the litter was sticking to his fur there) and I had to leave him I wanted to cry! when I take Louise to the vets or groomers she meows the whole time on the way! and there is no way to make them understand, unfortunatly I can't take them out for ice cream after!