Do you have anxiety? I do, it makes me feel uneasy, and worry a lot, usually just a generalized feeling
I have ADHD which causes axeity if I do not take my medicine, because I literally can't do anything right or finish anything. So yes at times. 
ADHD is not fun either, I have that too, a lot of people see it as a mental disorder, but I do not
For me, because I cannot function without medication I feel it is, but I think for those who can manage it without chemical intervention it may not be
Yeah there are certainly levels to it, anxiety sometimes is appropriate, but the difference is how regularly you suffer from it