I think I get this.
I often feel the need to double check my body, feels like what should be there isn't there or like certain parts should have a certain shape but don't. I often have a hard time trying to work out what's happening inside me, too, sometimes it puts me off my food or makes me panic, it's like my insides are slightly out of place or over-sized even though they're not (for a human, anyway). I guess to describe its like a patient in hospital who just lost a limb or had a transplant may be? Like I'm trying to feel something that's not there anymore. I also expect that the wind will raise my fur and that then I realise I've no fur but I like feel the expected feeling of fur in the wind, like when I brace for pain and feel the pain a bit even though I don't actually get the pain. Once I went to the cinema and felt like I really hard to walk on all fours, I don't know what did it but I had to really force myself to walk upright. I often feel my posture isn't right, I have a hard time being in a normal posture sometimes, and sometimes I feel my tail sway and I can expect-feel my fur get fanned. I don't know about ears, I wouldn't say I felt them anymore than I think anyone feel their ears, but there's this sense they're out of size and I sort of feel them rotate, it makes my brow/eyelid lift sometimes like I'm scanning my surroundings, very alert to sound. In fact so much, I can appear out of tune to what others next to me are talking about. And mentally, too, I like to sleep in the day even though I really can't in lifestyle, and I'm always a fox in dreams, I also am my fursona in my dreams at times, too. I don't know if its a therian thing but I also have like a daemon, like in the film Golden Compass? I always have, I taught him how to speak, he's a fox though he can maintain other forms too, he's always been with me, we like psychically communicate mostly rather than talk and if we talk it tends to stay in my/our head. I'm usually quiet and my mind is more subconscious than talkative but I think about others', it makes me want to have close friends to care for, like a fox in a fox family (not picky on species, though).