Ok...so I've tried to trim Lily's ears and it's not going so well. She is so scared of the sound...

I bought a new trimmer and it's loud as well, so tried a mustache trimmer...and she's scared of it too. I'm very worried that I'm going to scare her so much that when she goes to the groomer she'll be afraid right off the bat. When I did get it trimmed (not what it's supposed to be but I did get some hair off) the one ear came up, but they are both needing them trimmed so bad I really don't know where to turn or just give up on the whole ear's being up thing. How do I get them shaved without terrifing her???