Hi Emily.
I can empathize with your questions. I don't particularly like my job and it's hard to concentrate, things distracts me, thoughts distract me, sunshine on a window distracts me. I start something and drop it many times and sometime loose it before I finish and have start over. I am sure I could be classified as having ADD, except when I do love something (lately been hanging around in Psych Central - and I could call that an addiction if I wanted to be unkind to myself, but I don't, so I won't) I am focused like a Jedi Master.

Hang in there. Don't swarm yourself with all these questions.

And as for not liking your job, that too can be overcome, it's a matter of perspective. I am working with myself on a topic : "I used to love my job once upon time, what was it that I loved, and can I bring that quality back?"

Hugs.
Sunna