Thanks again everyone!
I do notice that Jenna is a vivid dreamer. She will start flapping her ears around and her feet start twitching and her eyes even open...sometimes I don't realize she is asleep! She even begins chewing or breathing hard and barking in her sleep, most of the time it's just a little whiffling, but she really gets going. I try to wake gently her before she gets too distressed. I have thought it might be a leg either falling asleep or a knee not in quite the right place. The first time she shrieked she was actually in bed with me and it was about 5 in the morning...I was terrified I'd rolled over onto her in my sleep! The second time I was just resting with her, I thought we were both awake, she was lying a little ways from me on the bed and just got up screaming and crawling towards me. It was awful!
I'll have it looked into. Spinal series and full check-up...got it. Can anyone tell me what the neurological tests are I should be asking for? It's nothing too invasive is it? Does she have to be anesthetized? She does have reverse sneezing issues, so I really don't want them intubating her ever again.