Okay, so here's the deal. I picked engineering as one of my two professions. When I clicked on my professions tab in my spell book, it had the gear symbol thing that I could click on and make stuff. I couldn't make anything at first until I got the stuff. Now the symbol is gone.

I thought it might be like the mining thing where you have to be by a forge to use it, so I went back to my city and tried it there, nothing. So I went to the engineering shop, again nothing. I even unlearned engineering (although it still shows up as one of my professions, just with zero skill), thinking I could relearn it from the engineering trainer. Wrong, he won't let me learn it. I have more than enough money, and I learned it before, so I'm pretty sure I meet any prerequisites. I just don't know why I could make crap before but now I can't, and how do I correct this.

Thanks in advance for your help, and for reading all of this. I don't know if I gave enough information, but I didn't want to make this incredibly long.
Okay, I thought the screenshot idea was great, so I logged back into WoW (I logged out earlier when I was having the problem), and everything was fine. I had to relearn engineering, but that's not a big loss being I only had 10 skill points.

The only thing I can think of is that the game was still finishing downloading when I started, and when it finished something might have gone wrong. I don't know, but it's fine now. I have my little cog and I can make dynamite.

Thanks for your help. I really appreciate it, and it will be hard choosing a best answer. I will though, because I don't like questions going to voting.