Edit*** i forgot to mention he is a great dane

My 3 year old (4 in nov) has been super lethargic for the past 5 days. Took him to the vet and started with bloodwork. According to the vet nothing is off. When he does wake up he eats and drinks fine and is using the bathroom. Recently the last day or so hes been pacing but goes right to sleep when i place him in bed. All of his hair is raised ONLY when hes outside. Im at a loss..financially and emotionally. Ive added pictures of his bloodwork and some videos.