I don't believe I have any mental illness. I was tested when I was younger if I was on the spectrum, which I'm not, and I'd like to think they'd have noticed if there were any other mental issues. Idk, sometimes I just feel a little more jittery/uneasy/shaky even if nothing has changed and I could feel comfortable and content but still feel jittery. I don't think it's nervousness. I'm not too sure what the cause is, I just know it's different