It could be that Layla is still a little scared about the firecrackers she heard. One time I was cooking and dropped a lid on the floor. Jackson was sleeping in his bed nearby....but I never let the boys get too close when I'm cooking because I might drop a lid or something

. It startled him awake and scared him really bad. He would not come near me for a few hours. I don't think he understood what happened, since he was sleeping at the time. That happened a few months ago, and he is still a little skittish when I'm cooking, but he gets better about it all the time. Sometimes when they get scared of something, it takes time for them to get over it. I would just keep reassuring her.
This definitely is not her norm because I've seen your grooming videos, and you can tell she totally trusts you. Hang in there, I know it makes you feel bad. I felt horrible when I scared Jackson.