Is this withdrawal?

I stopped playing about two weeks ago, give or take a few days. At first I noticed almost nothing. I didn't care one way or another about WoW. I didn't want to play, but it's not as if I thought I didn't want to play, it just never entered my mind.

Now it's different. I sort of want to play, but that's not my issue. I'm restless, feeling like I should be doing something. This isn't entirely negative. It's making me go out and do homework when I normally wouldn't. This isn't as great as it sounds since at the last minute I have nothing to do when normally I'd be doing homework.

So here's what I can't figure out: am I restless because of WoW, directly? In other words, is this a symptom of withdrawal? Or am I restless because now I have a lot more time and no standard filler activity? Or was I restless before and that's what made me quit?

Since I quit I've actually logged in twice. Once was to clean up my mailboxes. The other time was because a friend was wondering about my character to compare someone in his guild. He wanted me to tank for his guild on Sunday, but then I forgot. I suppose I didn't care enough.